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Photonics and Optoelectronic (SOPO), 2010 Symposium on

Date 19-21 June 2010

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Displaying Results 1 - 25 of 394
  • SOPO 2010 [Title page]

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  • SOPO 2010 [Copyright notice]

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  • SOPO 2010 Welcome

    Publication Year: 2010 , Page(s): i
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  • SOPO 2010 Conference Committee

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  • "Chang E-1" Ultraviolet Optical Sensor for the Moon

    Publication Year: 2010 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (297 KB) |  | HTML iconHTML  

    In this article, a three-axis Ultraviolet Optical Sensor (UVOS) is designed, which can solve the problem of attitude determination for large field observation in the near-earth orbit. By applying an irregular optical system, i.e. the reflecting arrays and combined optical system, a circular large field of view is divided into 8 sub-fields. UVOS will provide the three-axis attitude information and autonomous navigation data after image overlapping and image-processing. The maximum yaw angle of the three-axis ultraviolet optical sensor is less than 0.07°, and the maximum pitch angle is less than 0.15°. The UVOS can measure 5 magnitudes. It is can be treated as an important sensor for the space vehicles of deep space exploration. View full abstract»

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  • 10-Gb/s Vertical Cavity Surface Emitting Laser Driver

    Publication Year: 2010 , Page(s): 1 - 3
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (375 KB) |  | HTML iconHTML  

    A 10-Gb/s Vertical Cavity Surface Emitting Laser (VCSEL) current driver is designed in SMIC 0.18-μm RF CMOS technology, which will be used in the transmitter of optical interconnect system. High current driving capability as well as agile switching speed is achieved by shunt peaking technique and cascade structure. Under a single 1.8V power supply, the driver delivers a modulation current of more than 10mA and consumes only 22.5mW when working at 10-Gb/s. The simulation results show that it can drive the common anode VCSEL well. The chip size is 800×500μm^2. View full abstract»

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  • 320MHz Mode-Locking Pulse Yb-Doped Fiber Amplifier

    Publication Year: 2010 , Page(s): 1 - 3
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (181 KB) |  | HTML iconHTML  

    High repetition rate laser pulses amplified was of great significance. It was reported that the 320MHz mode-locking pulses were amplified by using a double-cladding ytterbium-doped fiber. The maximum output power is 1.2W and the gain is 16dB when the power of signal is 31mW and the launched pump power is 10W. The experiment demonstrated the self-oscillation was happen near the 1080nm when the fiber length is 9m.The experiment also demonstrated that the output power can be higher with increasing the pump power. View full abstract»

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  • 3D Seismic Data Segmentation Based on the Orientation Coherence Method

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1942 KB) |  | HTML iconHTML  

    This paper proposed a new volumn segmenting algorithm. Traditional segmentation methods like minimum-variance-based region growing define homogeneity criteria to be value related. This method using 3D seismic data's ridge and valley like structure extracts local orientation coherece first, then divides the homogeneity criteria into two parts. The first part uses a high threshold and the second one uses a low threshold and a coherence threshold. The two parts criteria makes the growing processing better. This new method has good performance in ununiform brightness condition, but the conherence value cube is time-consuming, and the user should define two extra threshold. View full abstract»

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  • 620Nm Red Light Promotes Celluar Viability and Mrna Expression of Collagen Type I in Bone Mesenchymal Stem Cells of Rat

    Publication Year: 2010 , Page(s): 1 - 3
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (296 KB) |  | HTML iconHTML  

    Phototherapy has attracted increasing attention in recent years because numerous applications and controlled studies on the method have been reported. According to these reports, low-level red light irradiation can lead to celluar proliferation and enhance cell differentiation. The purpose of this in vitro study is to investigate the influence of red light from a light-emitting diode (LED) on rat bone mesenchymal stem cells (BMCs). The cells were seeded in 35-mm tissue culture dishes and cultured in osteogenic differentiation medium (ODM). BMSCs were irradiated once with low-level red light (620nm, 1W, 1.5 J/cm2). Then we analyzed celluar viability via methyl-tetra-zolium (MTT) assay and mRNA expression of collagen, type I, alpha 1 (COL1A1) via reverse transcriptase-polymerase chain reaction (RT-PCR). MTT assay result indicated that irradiated cells significantly proliferated. The irradiated cells had higher mRNA expression of COL1A1 than the control. In conclusion, low-level red light from LED could enhance cellular viability and osteogenic differentiation of MSCs. View full abstract»

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  • A 10-Gb/s Inductorless CMOS Limiting Amplifier for Optic-Fiber Transmission System

    Publication Year: 2010 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (565 KB) |  | HTML iconHTML  

    A 10-Gb/s inductorless limiting amplifier for optic-fiber transmission system is designed and fabricated in a 0.18-μm CMOS technology. The whole circuit consists of an input buffer, three broadband gain stages, an output buffer for driving 50-Ω transmission lines and a DC offset cancellation circuit. By employing a third-order interleaving active feedback, the bandwidth of the proposed circuit can be effectively enhanced while maintaining a suppressed gain peaking within the frequency band. Consuming a DC power of 72 mW from a 1.8-V supply voltage, this limiting amplifier exhibits a voltage gain of 42 dB and a -3-dB bandwidth of 8.6 GHz, and it allows an input dynamic range of at least 40 dB. With a pseudo-random bit sequence at 10 Gb/s, the measured output swing and input sensitivity are about 350 mVpp and 10 mVpp, respectively. Due to the absence of the spiral inductors, the chip size of this limiting amplifier including the pads is 0.58 × 1.06 mm2, where the active circuit area only occupies 285 × 600 μm2. View full abstract»

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  • A 2-Channel Parallel 0.35im SiGe BiCMOS Laser Diode Driver

    Publication Year: 2010 , Page(s): 1 - 3
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB) |  | HTML iconHTML  

    This paper presents a 2-channel parallel laser diode driver processed by 0.35μm SiGe BiCMOS process. Each channel works at bite rate of 4Gbps. To increase bandwidth a "cross couple" capacitance cancel technology is introduced. An isolation method for parallel amplifier is used to avoid substrate coupling noise brought by the adjacent channel. The test results show the LDD can supply 20~80mA modulation current and 1~30mA biascurrent. View full abstract»

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  • A 95mw, 12fps, 3.2-Mpixel CMOS Imager with Nonlinear Response Programmable Gain Amplifier to Enlarge Dynamic Range

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (227 KB) |  | HTML iconHTML  

    A digital color 3.2-Mpixel CMOS imager has been realized in a standard 0.18um CMOS technology. This chip has integrated with a proposed high dynamic range programmable gain amplifier using the nonlinear function to satisfy the human eye response. For reducing the noise level before analog-to-digital converter, a low noise 2-shared 2.25T pinned photodiode active pixel and a correlated double sample circuit have designed into the chip. The 3.2Mpixel CMOS imager has integrated with the row/column decoder, analog signal process, timing control and simple digital signal process, so that the sensor can be directly connected with a microprocessor or computer. The pinned photodiode active pixel achieves a conversion gain of 750uV/electron, 1.2mv voltage noise level and 72dB dynamic range under the 12 fps video rate, the dark condition and 27 degrees. Also, 0.3% peak-to-peak fixed pattern noise has obtained. The chip area is 28.69mm2 that produces 24 bit RGB video at 12 frames per second (fps) under the clock of 108MHz. Total power dissipation is less than 95mW from both 2.8V analog supply and 1.8V digital supply. The developed CMOS imager technology improves the performance of image to a level comparable to CCD so that the 3.2M-pixel CMOS image can be applied for 3G camera mobile phone. View full abstract»

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  • A Binary Text Image Authentication Algorithm Based on Short Digital Signature

    Publication Year: 2010 , Page(s): 1 - 6
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (314 KB) |  | HTML iconHTML  

    A new binary text image authentication algorithm based on short digital signature is proposed for protecting binary text image completely. The digital signature is used to certificate the uniform blocks and the normalization pretreatment is used to certificate the non-uniform blocks. False alarms can be eliminated by joint certification. The experiments and the analysis show that the content of binary text images can be protected completely by appending very short digital signature to the original image. With fine visual effect, the algorithm has high performance in detecting and locating tampers. View full abstract»

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  • A Color Video Quality Assessment Based on Edge-Color Distortion

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (266 KB) |  | HTML iconHTML  

    With the development of image compress technology, video is used more and more often. For the complexity of the subjective video quality estimation, many researchers are pay attention to the objective video quality assessment. In this paper, we proposed a color video quality assessment based on edge-color distortion. First, the edge and the color distortion models are introduced. Then, the response functions of HVS to the two models are given by analyzing relation between predicted value of the two models and the subjective quality estimation. Finally, the functions are integrated into an equation which is used to measure the color video quality by using multiple linear regression analysis. The proposed method is tested on the video quality experts group (VQEG) Phase I FR-TV test data set. Experiments show that it has good correlation with perceived video quality. View full abstract»

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  • A Compact SMS Refractometer Based on HF Corrosion Scheme

    Publication Year: 2010 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (275 KB) |  | HTML iconHTML  

    A refractometer based on single-multi-single mode fiber (SMS) structure is demonstrated experimentally. The wavelength-encoding based demodulation is proposed and realized by the broadband source ASE and optical spectral analyzer. A corresponding HF corrosion method is proposed to improve the sensitivity of the SMS refractometer. Experimental and simulation results are given to prove the feasibility of the improved SMS refractometer. View full abstract»

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  • A Fast and Sub-Pixel Detector for Grid-Like Target in Camera Calibration

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1259 KB) |  | HTML iconHTML  

    Sub-pixel detection of target points is the performance bottleneck in camera calibration. Traditional algorithms are computational expensive or low precision when we do camera calibration in sport video analysis. In this paper, we propose a new algorithm to detect the grid-like target (i.e. tennis court in TV broadcasting). It has 3 parts: (1) color histogram based interested point classifier making our method faster; (2) sub-pixel refinement by non-linear least squares method improving the accuracy; (3) extended line scan using interested point as the start/end point finding the final line parameters. Results indicate that our detector is faster (<;9ms), more accurate and requires less memory than Hough based algorithms if target is grid-like: "straight lines link together". View full abstract»

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  • A Generalized DAMRF Image Model for Super-Resolution of License Plates

    Publication Year: 2010 , Page(s): 1 - 4
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (253 KB) |  | HTML iconHTML  

    In this paper, we propose a novel super-resolution image reconstruction algorithm to handle license plate texts in real traffic videos. A generalized discontinuity adaptive Markov random field (DAMRF) model is proposed based on the recently reported bilateral filtering, which is not only edge preservation but also robust to noise. Moreover, instead of looking for fixed value for the regularization parameter, a method for automatically estimating it is applied to the proposed model based on the input images. We use graduated non-convexity (GNC) optimization procedures to minimize the cost function. Results on synthetic and several real traffic sequences are presented, showing the effectiveness of the proposed method and demonstrating its superiority to the conventional DAMRF super-resolution method. View full abstract»

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  • A Highly Parallel Beam-Addressed True Three-Dimensional Volumetric Display System

    Publication Year: 2010 , Page(s): 1 - 5
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (735 KB) |  | HTML iconHTML  

    A volumetric display with true depth has been studied in this paper. It is based on a swept volume technique, generating an array of voxels within a space swept out by a rotating-screen. with the help of the advanced digital light processing technique, 2-D slice images of the 3-D model are projected in rapid succession onto a helical screen spinning at a sufficiently high speed, because of the persistence of vision, the viewers' eyes integrates them into a 3-D spatial image. We have demonstrated the feasibility of our system by building a compact and modular prototype, images can consist of up to 100 millions voxels at a refresh rate of 20 Hz, and it can be viewed directly by any number of viewers from almost any direction, just as if the real 3-D objects were floating there. View full abstract»

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  • A High-Performance JPEG2000 Decoder Based on FPGA According to DCI Specification

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (272 KB) |  | HTML iconHTML  

    We present a hardware JPEG2000 decoder architecture based on the DCI specification, which can decode digital cinema frames without accessing any external memory. Besides, an innovative method is proposed to implement decoding process in accordance with the order of output images rather than sequentially to the input code-stream. In this way, not only can the decoded images be outputted immediately, but the storage resources for those middle states and temporary image data can be obviously reduced. View full abstract»

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  • A Labview Based Motion Control System for the Development of a Fluorescence Ultra-Fast Continuous Flow Rapid Mixing Device

    Publication Year: 2010 , Page(s): 1 - 3
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    This paper introduces a LabVIEW based high precision motion control system for the development of a fluorescence ultra-fast continuous flow rapid mixing device. Solutions inside two syringes were co-injected by step-motor controlled syringe plunger movements into a micro-fluid mixer where the mixing process stars. The step motors were controlled by a NI 7344 motion controller programmed by the LabVIEW 8.2 real-time development system. Integration of these motion hardware and software products provides a fast prototyping for the ultra-fast mixing device. View full abstract»

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  • A Low Power Sensor-Signal Read-Out Circuit for Very Low-Level Chemical Detection

    Publication Year: 2010 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (977 KB) |  | HTML iconHTML  

    Micromachining techniques have been employed to manufacture microparticles bearing an engraved dot-type signature for biomolecular encoding. In addition, the code introduced on the particle face is a straightforward visible feature that is easily recognizable with the use of optical microscopy on the grounds of the CdSe Quantum dots (QDs) as fluorescent probes. In this paper, An integrated CMOS circuit for detection of very low-level bioluminescence is presented. View full abstract»

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  • A Macrobending Fiber Based Micro-Displacement Sensor

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (202 KB) |  | HTML iconHTML  

    An all-fiber micron displacement sensor with a simple configuration is proposed and investigated experimentally. The proposed fiber displacement sensor consists of a half-loop structure of bare high-bend loss singlemode fiber-1060XP, employing the well-known Whispering Gallery mode (WGM) effect. A ratiometric power measurement system for interrogating the proposed sensor is also presented. By measuring the change in ratio of bend loss in the ratiometric system, a change in displacement can be measured assuming the ratiometric system is calibrated. The proposed macrobending fiber based displacement sensor achieves a higher resolution (less than 75 nm of displacement) than other conventional fiber-optic sensors and also benefits from simplicity. View full abstract»

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  • A Method of 3D Building Boundary Extraction from Airborne LIDAR Points Cloud

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (274 KB) |  | HTML iconHTML  

    Building boundary is of great significance for building reconstruction and digital mapping. The emergence of airborne LIDAR technology makes rapid extraction of buildings possible. Based on the analysis of existing buildings extraction method, the article proposes an automatic method for extracting 3D building boundaries directly from airborne LIDAR points cloud, which consists of three steps: firstly, building points are segmented by a multi-resolution directional prediction filter method and roof points are then recognized by a series of refinement procedure; Secondly, TIN mode is built by roof points and initial boundaries are extracted by analysis of height differences among vertices and relationships between vertex and edge of TIN facets. Lastly, initial boundaries are regularized by a modified method for roofs with different shapes. Datasets with different roof types are selected to test the proposed approach and results show that it can correctly extract 3D buildings boundaries from discrete LIDAR points cloud. View full abstract»

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  • A Modified Constrained Random Selection Approach for Relevance Feedback

    Publication Year: 2010 , Page(s): 1 - 5
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (301 KB) |  | HTML iconHTML  

    A modified constrained random selection approach for relevance feedback is proposed in this paper. The modified method improves the representative of the negative samples, and solves the "small size sample problem" at certain degrees. Experiments demonstrated that better feedback results have got within less feedback times, comparing with original constrained random selection approach. View full abstract»

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  • A New Angle-Based Spectral Index and Its Application in Drought Monitoring

    Publication Year: 2010 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (298 KB) |  | HTML iconHTML  

    An angle-based drought spectral index (ABDI) was proposed aimed to drought monitoring based on Near Infrared (NIR, 858 nm) and Shortwave Infrared (SWIR, 1240 and 1640 nm) bands of the Moderate Resolution Imaging Spectrometer (MODIS). The Shortwave Angle Slope Index (SASI) is reviewed and analyzed. United States Geological Survey (USGS) spectral datasets were employed to validate the ability of ABDI to estimate soil and vegetation moisture. Six-year(2002-2007) time series of Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI) and ABDI was created and analyzed for drought assessment and monitoring within the region of Nanchong in Sichuan Province, using MODIS history data and meteorological data. The investigation of a six-year history of MODIS NDVI, NDWI and ABDI indicates that a strong relationship exists among NDWI, ABDI and 2006 drought conditions of eastern Sichuan Basin. And the proposed ABDI had a stronger response to regional drought than NDVI and NDWI, which can be a practical method of drought monitoring in both accuracy and efficiency. View full abstract»

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