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Lightwave Technology, Journal of

Issue 24 • Date Dec.15, 2010

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  • [Front cover]

    Publication Year: 2010 , Page(s): C1
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  • Journal of Lightwave Technology publication information

    Publication Year: 2010 , Page(s): C2
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  • Table of contents

    Publication Year: 2010 , Page(s): 3495 - 3496
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  • Performance Comparison of Using SOA and HNLF as FWM Medium in a Wavelength Multicasting Scheme With Reduced Polarization Sensitivity

    Publication Year: 2010 , Page(s): 3497 - 3505
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1043 KB) |  | HTML iconHTML  

    In this paper, we propose and demonstrate the practical all-optical wavelength multicasting scheme based on the four-wave mixing (FWM) effect in both a highly nonlinear fiber (HNLF) and a semiconductor optical amplifier (SOA). Then we carry out comprehensive comparisons of the performance differences between using the HNLF and SOA for this proposed multicasting scheme. Seven multicast channels are experimentally demonstrated by using three co-polarized probes and a modulated signal. The merit of the proposed scheme is that the polarization sensitivity is significantly reduced from more than 20 dB to approximately 5 dB using the HNFL and 2.5 dB using the SOA. The low polarization sensitivity leads to a difference of less than 1 dB in the power penalty of the multicast channels at bit error rate . In addition, we compare the multicasting performance of the OOK and differential phase-shift keying (DPSK) signals using the proposed scheme and found that the power penalties of the DPSK multicast channels in the HNLF and the SOA are less than 1.25 and 1.1 dB respectively, and the power penalties of the OOK multicast channels are less than 1.5 dB and 3.1 dB in the HNLF and the SOA, respectively. View full abstract»

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  • Mitigation of Imperfect Carver-Induced Phase Distortions in a Coherent PM-RZ-QPSK Receiver

    Publication Year: 2010 , Page(s): 3506 - 3511
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (789 KB) |  | HTML iconHTML  

    The impact of phase distortions caused by imperfect return-to-zero (RZ) pulse carving on 112 Gb/s polarization-multiplexed (PM)-RZ-quadrature-phase-shift-keying (QPSK) is investigated, and mitigation of the phase distortion is demonstrated by using digital signal processing technique. We show that carver-induced phase distortion causes an error in frequency offset estimation as well as sensitivity degradation. Based on the periodicity of distortion pattern, the phase distortion is compensated by estimating mean phase distortions for even and odd symbols after block phase estimation and subtracting these values from original symbols. The optical SNR penalty measured at 112 Gb/s PM-RZ-DQPSK signal is reduced from 3.8 to 1.1 dB with the help of correction algorithm. View full abstract»

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  • 513 Mbit/s Visible Light Communications Link Based on DMT-Modulation of a White LED

    Publication Year: 2010 , Page(s): 3512 - 3518
    Cited by:  Papers (58)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (623 KB) |  | HTML iconHTML  

    We report a visible-light wireless point-to-point communication link operating at 513 Mbit/s gross transmission rate (net Mbit/s). The bit-error ratio of the uncoded data was smaller than for an illumination level of lx. The link was based on a commercial thin-film high-power phosphorescent white LED, an avalanche photo diode, and off-line signal processing of discrete multitone signals. Quadrature-amplitude modulation, bit- and power-loading, as well as symmetrical clipping were successfully employed in pushing the gross transmission rate beyond 500 Mbit/s. Adaptation of the clipping level increased the data rate only by 2%, while simulations predicted an enhancement of 20%. Obstacles towards higher data rates as well as potential remedies are discussed. We predicted that data rates of over 1 Gbit/s can be achieved with the same setup and under the same experimental conditions if these obstacles are overcome. View full abstract»

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  • Wavelet Packet Transform-Based OFDM for Optical Communications

    Publication Year: 2010 , Page(s): 3519 - 3528
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (969 KB) |  | HTML iconHTML  

    Wavelet packet transform-based optical OFDM (WPT-OFDM) systems can be used as an alternative approach to the conventional optical OFDM systems. In this paper, we investigate the performance and limitation of real WPT-OFDM systems. Its double-sideband characteristic makes it sensitive to spectrally non-symmetric dispersion such as polarization-mode dispersion (PMD). Simulations of dual-polarization WPT-OFDM transmission are carried out in the presence of PMD, and compared with conventional Fourier transform-based optical OFDM (FT-OFDM). The results show that WPT-OFDM is very sensitive to PMD, incurring 1-dB penalty at 5-11 ps DGD for 112-Gb/s dual-polarization transmission. PAPR and nonlinearity performance of WPT-OFDM are also analyzed in this work. We show that the Haar wavelet has 0.9-dB improvement in nonlinear launch power limit compared with FT-OFDM (CP=1/8) in a conventional transmission dispersion configuration where inline dispersion is fully compensated by a dispersion-compensation-fiber (DCF). View full abstract»

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  • Mode Conversion/Splitting by Optical Analogy of Multistate Stimulated Raman Adiabatic Passage in Multimode Waveguides

    Publication Year: 2010 , Page(s): 3529 - 3534
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (414 KB) |  | HTML iconHTML  

    We propose and describe mode converter/splitter based on optical analogy of multistate stimulated Raman adiabatic passage in multimode waveguides. Computer-generated planar holograms are used to implement the coupling coefficients that mimic the optical pulses used in the transfer among quantum states of atoms and molecules. The mode coupling properties in multimode waveguides are analyzed using the coupled-mode theory and shown to resemble the multistate stimulated Raman adiabatic passage process. Key features of multistate systems are illustrated with theoretical calculations and numerical examples. Mode converter and splitter are designed based on the theoretical analysis and verified using beam propagation simulations. View full abstract»

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  • Single-Multi-Single Mode Structure Based Band Pass/Stop Fiber Optic Filter With Tunable Bandwidth

    Publication Year: 2010 , Page(s): 3535 - 3541
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (795 KB) |  | HTML iconHTML  

    We present a simple, efficient and easy to fabricate single-multi-single mode (SMS) fiber-based tunable bandwidth optical bandpass/bandstop filter. The device exploits the transmission characteristics of an SMS structure near its critical wavelength. Using both temperature and strain tuning, we show that the device can be switched between band pass to band stop modes and that the filter bandwidth in each mode can be dynamically tuned. We present a theoretical analysis of the observed behavior and obtain excellent agreement with the experimental observations. View full abstract»

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  • Low-Loss Photonic Crystal Fiber Interferometers for Sensor Networks

    Publication Year: 2010 , Page(s): 3542 - 3547
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (728 KB) |  | HTML iconHTML  

    This work addresses important issues of photonic crystal fiber (PCF) interferometers built by fusion splicing: high insertion loss, low mechanical strength, and complex multiplexing schemes. We have found that by decreasing the length of the collapsed region in these interferometers, the overall insertion losses diminish (down to 0.7 dB) without compromising their performance and mechanical strength. To multiplex such interferometers, we have used the frequency-division-multiplexing technique combined with a simple fast Fourier transform demodulation method. To avoid crosstalk between the interferometers, we have calculated the optimal relationship between their periods. The results reported here may allow the development of functional and competitive PCF devices or PCF-based sensor networks and can be adapted to multiplex any other optical fiber sensors that exhibit sinusoidal patterns. View full abstract»

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  • Impact of Electro-Absorption Modulator Integrated Laser on MB-OFDM Ultra-Wideband Signals Over Fiber Systems

    Publication Year: 2010 , Page(s): 3548 - 3555
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (743 KB) |  | HTML iconHTML  

    This paper presents investigation of the impact of electro-absorption modulator integrated laser (EML) on performance of multiband-orthogonal frequency-division-multiplexing (MB-OFDM) ultra wideband (UWB) signal over single-mode fiber transmission by theoretical and experimental analysis, considering various parameters, such as fiber length, bias voltage, modulation power, bias current, and temperature of EML. The effect of the EML modulation nonlinearities on the OFDM subcarriers in MB-OFDM UWB over fiber system is investigated considering intermodulation distortion (IMD) and adjacent channel power ratio. It is shown that MB-OFDM UWB over fiber is limited by SNR for small modulation power and EML modulation nonlinearities induced IMD for high modulation power. Fiber transmission length is mainly degraded by EML phase noise converted relative intensity noise and power fading. The developed theory is verified by experiments. View full abstract»

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  • Fiber Identification Technique Based on Mechanically-Induced Long-Period Grating for Bending-Loss Insensitive Fibers

    Publication Year: 2010 , Page(s): 3556 - 3561
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (286 KB) |  | HTML iconHTML  

    The macro-bending based fiber identification technique is widely used to identify optical fibers at the worksite. Bending-loss insensitive fibers have been receiving increasing attention, however it is difficult to apply the macro-bending based fiber identification technique to these fibers. In this paper, we propose a new fiber identification technique based on a mechanically induced long-period grating (LPG), and show that the proposed technique can be utilized for a hole-assisted fiber with an extremely low bending loss. We also propose combining the chirped LPG technique with our fiber identification method to simultaneously specify fibers with different structures. View full abstract»

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  • STRD and Near Field Modeling of Metallic Wedges for Optical Detection Systems

    Publication Year: 2010 , Page(s): 3562 - 3568
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (989 KB) |  | HTML iconHTML  

    We analyze an accurate approach based on the Simultaneous Transverse Resonance Diffraction (STRD) modeling. The new method allows to evaluate by means of transmission line circuits the near field generated by a metallic wedge excited by an optical source. The STRD technique is implemented in the rigorous multipole expansion of the Green's function (MEG) theory by providing a modeling of material permittivity detection for wireless micro/nano systems. A good agreement between finite element method (FEM), finite difference time domain (FDTD) and STRD/MEG results is found. Requiring a low computational cost, the proposed modeling is suited for electromagnetic simulators. View full abstract»

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  • On-Chip Wireless Optical Broadcast Interconnection Network

    Publication Year: 2010 , Page(s): 3569 - 3577
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1699 KB) |  | HTML iconHTML  

    An on-chip wireless optical broadcast network for future multicore CPU interconnections is introduced in this paper. A baseline topology is composed of 32 identical transmitting/receiving optical dielectric rod antennas arranged around a circular ring. To ensure balanced power distribution between the channels, the optical antenna design was governed by the antennas' far-field radiation pattern and near-field coupling. Over the frequency range of 172 THz (1750 nm) and 222 THz (1350 nm), the broadcasting network has average and minimum transmissions of -16 and -21.5 dB, respectively. The overall transmission efficiency is maintained above 70% throughout the operating bandwidth. Results are confirmed by the full-wave simulations based on finite integration and finite element methods. For additional validation, an eight-channel microwave broadcasting network is fabricated, and excellent agreement between the full-wave design and measurements are obtained. View full abstract»

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  • Continuous Wave Laser Generation in Proton Implanted Nd:GGG Planar Waveguides

    Publication Year: 2010 , Page(s): 3578 - 3581
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    We report on room temperature continuous wave laser generation at ~1062 nm from proton implanted Nd:GGG planar waveguides. Single-mode stable laser operation is realized with an 808-nm pump source, resulting in a laser threshold of ~49.3 mW and slope efficiency of 30%. The maximum output power of ~21.9 mW, an absorbed pump power of ~117.4 mW, leads to an optical-to-optical conversion efficiency of 18.7%. View full abstract»

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  • Wide-Angle Lens Array Spatial Acquisition With Ultrawide Field of View in Optical Links Under Atmospheric Scintillation and Background Radiation

    Publication Year: 2010 , Page(s): 3582 - 3588
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (213 KB) |  | HTML iconHTML  

    We propose a wide-angle lens array scheme, which can provide spatial acquisition with ultrawide field of view (FOV) in free-space optical (FSO) links. This acquisition array is composed of sub-arrays, with each subarray including receiving elements. The elements in a subarray are arranged in the same direction to receive the laser beacon together, while the subarrays are arranged in different directions to cover an ultrawide FOV (a hemisphere with a solid angle of ). The elements in a subarray can increase the total aperture size to restrict the laser power fluctuation induced by atmospheric scintillation. The subarrays can disperse the ultrawide FOV to reduce the received background power on each element. Therefore, the elements in a subarray and the subarrays can both contribute to the improvement of the SNR, which can improve the spatial acquisition performance of the wide-angle array. The missed detection probability (MDP), as a parameter to describe the spatial acquisition performance, is investigated for the wide-angle lens array spatial acquisition scheme under atmospheric scintillation and background radiation. Results show that the proposed array scheme can improve the spatial acquisition performance degraded by atmospheric scintillation and background radiation. The acquisition performance can be further enhanced with the increase of element number in a subarray and subarray number , where the elements in a subarray and the subarrays are designed to suppress atmospheric scintillation and background radiation, respectively. View full abstract»

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  • Design and Performance of MEMS Multifunction Optical Device Using a Combined In-Plane and Out-of-Plane Motion of Dual-Slope Mirror

    Publication Year: 2010 , Page(s): 3589 - 3598
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2356 KB) |  | HTML iconHTML  

    A reflection-type MEMS multifunction-integrated optical device using the combined in-plane and out-of-plane motion of a dual-slope mirror is proposed. The motion of the mirrors results in the corresponding optical axis offsets in the transmitting and receiving optical signals, which can enable the device with variable optical power splitting, optical switching and variable optical attenuating functions. The optical models for splitting and attenuating are presented, respectively. The electro-mechanical characteristics of the device are also investigated. Measurements of the fabricated devices show that the switching times is less than 9 ms. The excess loss of the device is less than 3 dB and the controllable attenuation range is up to 39 dB, respectively. Moreover, polarization-dependent loss is less than 0.7 dB in the whole attenuation and splitting range. View full abstract»

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  • Sub-Terahertz Transceiver Module Integrating Uni-Traveling-Carrier Photodiode, Schottky Barrier Diode, and Planar Circulator Circuit

    Publication Year: 2010 , Page(s): 3599 - 3605
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (406 KB) |  | HTML iconHTML  

    A compact sub-terahertz transceiver module integrating a uni-traveling-carrier photodiode, a Schottky barrier diode, and a planar circulator circuit has been developed. A 180-degree rat-race hybrid circuit fabricated on a quartz substrate is employed as the circulator. All the components are assembled in a compact rectangular-waveguide-output package for operation in the J-band. The frequency dependence of the detection sensitivity of the transceiver module showed clear resonant behavior at around 270 GHz while the output power showed no distinct resonance. The insertion loss of the circulator for the input and output signals at 270 GHz were estimated to be 4.6 dB and 11.4 dB, respectively. The isolation between the output port and the SBD port of the circulator was evaluated to be 14.3 dB at 270 GHz, indicating that the fabricated module functioned properly as a transceiver. The linearity of the output power and the input sensitivity of the transceiver were also confirmed to be very good. This is the first demonstration of a photonic mm-wave transceiver module for continuous waves operating at around 300 GHz. View full abstract»

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  • IEEE International Vacuum Electronics Conference

    Publication Year: 2010 , Page(s): 3606
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  • OFCNFOEC

    Publication Year: 2010 , Page(s): 3607
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • 2011 IEEE EDS Masters Student Fellowship

    Publication Year: 2010 , Page(s): 3608
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    Freely Available from IEEE
  • IEEE Photovoltaic Specialist Conference

    Publication Year: 2010 , Page(s): 3609
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    Freely Available from IEEE
  • IEEE Foundation [advertisement]

    Publication Year: 2010 , Page(s): 3610
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    Freely Available from IEEE
  • 2010 Index Journal of Lightwave Technology Vol. 28

    Publication Year: 2010 , Page(s): 3611 - 3680
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    Freely Available from IEEE
  • Journal of Lightwave Technology Information for authors

    Publication Year: 2010 , Page(s): C3
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    Freely Available from IEEE

Aims & Scope

The Journal of Lightwave Technology contains articles on current research, applications and methods used in lightwave technology and fiber optics.

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Meet Our Editors

Editor-in-Chief
Peter J. Winzer
Alcatel-Lucent Bell Labs