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# IEEE Photonics Technology Letters

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Displaying Results 1 - 25 of 45
• ### [Front cover]

Publication Year: 2009, Page(s): C1
| PDF (167 KB)
• ### IEEE Photonics Technology Letters publication information

Publication Year: 2009, Page(s): C2
| PDF (38 KB)

Publication Year: 2009, Page(s):1787 - 1788
| PDF (47 KB)
• ### High Quality-Factor 1-D-Suspended Photonic Crystal/Photonic Wire Silicon Waveguide Micro-Cavities

Publication Year: 2009, Page(s):1789 - 1791
Cited by:  Papers (14)
| | PDF (239 KB) | HTML

We have successfully fabricated and characterized suspended one-dimensional (1-D) photonic crystal/photonic wire (PhC/PhW) waveguide micro-cavities based on silicon-on-insulator (SOI). Our experiments have shown an enhancement of the resonance Q -factor from 18 700 to approximately 24 000, with normalized optical transmission of 70%, after removing the silica cladding underneath the silicon... View full abstract»

• ### Modulation Bandwidth Enhancement in Optical Injection-Locked Semiconductor Ring Laser

Publication Year: 2009, Page(s):1792 - 1794
Cited by:  Papers (9)
| | PDF (381 KB) | HTML

The modulation bandwidth of a optical injection-locked (OIL) master-slave configuration using a semiconductor ring laser (SRL) as the slave laser is investigated. The modulation bandwidth depends on the detuning frequency, input optical power into the slave SRL, and the bias current to the SRL in the master-slave configuration. Modulation bandwidth of >40 GHz has been achieved when modulating t... View full abstract»

• ### OCDMA En/Decoders Employing Multiple $pi$ Equivalent Phase Shifts

Publication Year: 2009, Page(s):1795 - 1797
Cited by:  Papers (2)
| | PDF (301 KB) | HTML

Based on the equivalent phase shift (EPS) technology, the optical code-division multiple access (OCDMA) en/decoders employing multiple pi-EPSs have been studied both numerically and experimentally, which demonstrate good en/decoding performances. It is also shown that the insertion of multiple pi-EPSs offers a new degree of freedom for OCDMA security, in which the multiple pi -EPSs decoder is comp... View full abstract»

• ### Fabrication of n-Type Silicon Optical Fibers

Publication Year: 2009, Page(s):1798 - 1800
Cited by:  Papers (24)
| | PDF (622 KB) | HTML

In this research, for the first time, an n-type silicon optical fiber is demonstrated. The fiber is fabricated by drawing from a powder-in-tube-type preform. Outside diameters in the range of several hundred micrometers were made with core diameters in the range of tens of micrometers. Optical and material characterizations have been made in order to understand the structural and compositional pro... View full abstract»

• ### Measured Temporal Statistics of the DGD RMS-Value in Buried Optical Fibers

Publication Year: 2009, Page(s):1801 - 1803
Cited by:  Papers (2)
| | PDF (671 KB) | HTML

The behavior of the differential group delay (DGD) root-mean-square (rms) value is investigated for a buried G.652 fiber line in a metropolitan fiber plant outside Stockholm, Sweden. This study presents measurement results from two different measurement periods where the same fiber and the same measurement equipment was used. In total, ~ 2800 hours of measurements were performed. As expected, the ... View full abstract»

• ### Solid Microstructured Chalcogenide Glass Optical Fibers for the Near- and Mid-Infrared Spectral Regions

Publication Year: 2009, Page(s):1804 - 1806
Cited by:  Papers (14)
| | PDF (338 KB) | HTML

This paper demonstrates a new and flexible route to microstructuring of chalcogenide glass fiber for operation in the near- to mid-infrared, presenting an alternative to air-glass microstructuring. For the first time, a one-layer, solid microstructured optical fiber is successfully drawn from As40Se60 and Ge10As23.4Se66.6 (atomic %) chalcogeni... View full abstract»

• ### Spatial Equalization of Zero-Dispersion Wavelength Profiles in Nonlinear Fibers

Publication Year: 2009, Page(s):1807 - 1809
Cited by:  Papers (31)
| | PDF (373 KB) | HTML

Longitudinal zero-dispersion wavelength (ZDW) fluctuations in long waveguides impose a fundamental limit on the achievable parametric mixer bandwidth. We demonstrate for the first time that the precisely measured ZDW profile can be taken advantage of by applying spatially controlled tension along the fiber length for fluctuation reduction and synthesis of a wide mixer response. The technique was e... View full abstract»

• ### Enhanced Dynamic Range in a Directly Modulated Analog Photonic Link

Publication Year: 2009, Page(s):1810 - 1812
Cited by:  Papers (4)
| | PDF (328 KB) | HTML

We demonstrate a directly modulated analog photonic link (APL) capable of a high multioctave spurious-free dynamic range (SFDR). The APL consists of a pair of laser diodes, modulated in a push-pull manner, and a balanced photodetector aiming at suppressing the second-order intermodulation distortion (IMD2). In a wide frequency range of 600 MHz (2.60-3.20 GHz), an IMD2 suppression as high as 23 dB ... View full abstract»

• ### High-Power Monolithically Integrated Traveling Wave Photodiode Array

Publication Year: 2009, Page(s):1813 - 1815
Cited by:  Papers (7)
| | PDF (329 KB) | HTML

A novel traveling wave photodiode array (TWPDA) based on back-illuminated InGaAs-InP charge compensated modified uni-traveling carrier photodiodes is demonstrated. A two-element TWPDA with integrated termination resistor has a responsivity of 0.55 A/W and bandwidth of 17 GHz. The saturation photocurrent and the available electrical output power are 114 mA and + 13 dBm at - 3.5-V bias voltage, resp... View full abstract»

• ### Investigation on WDM Nonlinear Impairments Arising From the Insertion of 100-Gb/s Coherent PDM-QPSK Over Legacy Optical Networks

Publication Year: 2009, Page(s):1816 - 1818
Cited by:  Papers (10)  |  Patents (3)
| | PDF (303 KB) | HTML

In the perspective of smooth capacity upgrades of legacy systems, we experimentally investigate the performance of one 100-Gb/s coherent polarization-division-multiplexed quaternary-phase-shift-keying (PDM-QPSK) channel inserted in a 10-Gb/s ultra-long-haul (ULH) wavelength-division-multiplexing system relying on nonzero dispersion-shifted fibers. The impact of copropagating 10-Gb/s nonreturn-to-z... View full abstract»

• ### Chaotic Dynamics in Resonant Tunneling Optoelectronic Voltage Controlled Oscillators

Publication Year: 2009, Page(s):1819 - 1821
Cited by:  Papers (5)
| | PDF (270 KB) | HTML

A new way of generating electrical and optical chaotic carriers is demonstrated using an optoelectronic voltage controlled oscillator consisting of a laser diode (LD) driven by a resonant tunneling diode (RTD) perturbed by radio-frequency signals. The high-dimensional broadband (gigahertz-wide) chaotic current produced by the RTD modulates a LD, providing a simple way to convert electrical chaotic... View full abstract»

• ### Bulk-Micromachined VCSEL At 1.55 $mu$m With 76-nm Single-Mode Continuous Tuning Range

Publication Year: 2009, Page(s):1822 - 1824
Cited by:  Papers (13)
| | PDF (293 KB) | HTML

A single-mode continuous tuning range of 76 nm is realized using a bulk-micromachined vertical-cavity surface-emitting laser (VCSEL) operating at wavelengths around 1.55 mum. The bulk-micromachined upper mirror is optimized for dielectric material and manufactured separately from the half-VCSEL. The VCSEL is tuned by an electrothermal actuation of a concave bended membrane. The tuning range charac... View full abstract»

• ### Characterization of a 2 $,times,$2 Optical Switch Based on a Multitransducers Acousto-Optic Deflector

Publication Year: 2009, Page(s):1825 - 1827
| | PDF (338 KB) | HTML

We present the experimental characterizations of a 2 times 2 optical switch based on a multitransducers acousto-optic tellurium dioxide (TeO2) deflector. The deflector is realized by the superimposition of two phase gratings in a crystal. This switch is dedicated to the telecommunication applications. We show, in this study, that the crosstalk does not exceed -50 dB and the switch depen... View full abstract»

• ### Relative Humidity Sensor Based on Cascaded Long-Period Gratings With Hydrogel Coatings and Fourier Demodulation

Publication Year: 2009, Page(s):1828 - 1830
Cited by:  Papers (13)
| | PDF (243 KB) | HTML

A Mach-Zehnder interferometer based on cascaded long-period gratings with a hydrogel thin-film coating is developed for monitoring the relative humidity (RH). The visibility of fringes and phase shift of the fringes are measured using Fourier analysis. The sensors show good linearity using the visibility of fringes from 60%RH to 100%RH with the ability to measure below 60% at reduced accuracy usin... View full abstract»

• ### Broadside Excitation of Long-Range Surface Plasmons via Grating Coupling

Publication Year: 2009, Page(s):1831 - 1833
Cited by:  Papers (3)
| | PDF (232 KB) | HTML

A metal grating for coupling a Gaussian beam incident from broadside to the long-range surface plasmon-polariton (LRSPP) propagating along a membrane-supported Au slab is proposed and modelled by the finite-difference time-domain method. A short grating design consisting of a small number of Au bumps yields a 19.5% coupling efficiency at ??0 = 1310 nm into the LRSPP propagating in a sin... View full abstract»

• ### 4-GHz Modulation Bandwidth of Integrated 2$,times,$2 LED Array

Publication Year: 2009, Page(s):1834 - 1836
Cited by:  Papers (3)
| | PDF (387 KB) | HTML

We demonstrate a 4.3-GHz high-speed "tilted-charge" integrated 2×2 light-emitting diode (LED) array. With an array of four LEDs operating in parallel, the optical output power can be as much as tripled while the peak high-speed performance of its individual LED component is preserved. The gigahertz bandwidth is achieved by utilizing a "drain" layer, common to all the devices in the array, to ... View full abstract»

• ### Efficient All-Optical Wavelength-Conversion Scheme Based on a Saw-Tooth Pulse Shaper

Publication Year: 2009, Page(s):1837 - 1839
Cited by:  Papers (8)
| | PDF (265 KB) | HTML

We experimentally demonstrate the use of saw-tooth optical pulses, generated using a superstructured fiber Bragg grating, to achieve high performance and efficient all-optical wavelength conversion in a scheme based on cross-phase modulation in a highly nonlinear fiber, with subsequent offset filtering. Compared to the use of more conventional waveforms, such as Gaussian pulses, the purpose-shaped... View full abstract»

• ### Impedance Characteristics and Parasitic Speed Limitations of High-Speed 850-nm VCSELs

Publication Year: 2009, Page(s):1840 - 1842
Cited by:  Papers (14)
| | PDF (183 KB) | HTML

The impedance characteristics of high-speed oxide-confined 850-nm vertical-cavity surface-emitting lasers have been studied with the aim of identifying the importance of device parasitics for the modulation bandwidth. Through equivalent circuit modeling, it is confirmed that device parasitics have a major impact on the bandwidth and the importance of each individual circuit element has been invest... View full abstract»

• ### High-Stability Er-Doped Superfluorescent Fiber Source Incorporating Photonic Bandgap Fiber

Publication Year: 2009, Page(s):1843 - 1845
Cited by:  Papers (8)
| | PDF (548 KB) | HTML

A tunable photonic bandgap fiber filter was incorporated in an Er-doped superfluorescent fiber source to improve its mean wavelength thermal stability. This simple filter was able to successfully compensate the mean wavelength to less than 10 ppm from - 40??C to 70??C. When the environmental temperature was controlled to ??0.5??C, the superfluorescent fiber source (SFS) exhibited a long-term mean ... View full abstract»

• ### Enhanced Tolerance to Phase Distortion Due to Setting Errors in a DxPSK Modulator by Using Data-Aided Phase Noise Estimation Algorithm

Publication Year: 2009, Page(s):1846 - 1848
| | PDF (250 KB) | HTML

The bit-error-rate performance of a multilevel phase-shift-keying (PSK) signal can be easily degraded by a slight phase distortion induced by the setting errors of the modulator such as the offsets of bias voltages. To solve this problem, we examine the possibility of using the data-aided phase noise estimation (DAPNE) algorithm, which has been originally proposed for the reduction of differential... View full abstract»

• ### Improvements of Dielectric Columniation Triangular Lattice for Obtaining Absolute Band Gap in Visible Range

Publication Year: 2009, Page(s):1849 - 1851
Cited by:  Papers (1)
| | PDF (363 KB) | HTML

Two-dimensional dielectric columniation triangular lattice is improved by means of the deformed triangular lattice and the gradual period and gradual index distribution photonic heterostructure. Through the two improvements, absolute band gaps can be obtained using low refractive index materials. The theoretical analysis and the experimental verifications are given. View full abstract»

• ### Multiplication Noise Characterization of InAlAs-APD With Heterojunction

Publication Year: 2009, Page(s):1852 - 1854
Cited by:  Papers (4)
| | PDF (266 KB) | HTML

The excess noise and ionization coefficient ratio of InAlAs avalanche photodiodes (APDs) with heterojunctions has been measured. To obtain these values accurately, we used a differential amplifier and determined the optical current at which the avalanche multiplication equals 1. These made it possible to conduct measurements on excess noise including that in the low multiplication region. Measured... View full abstract»

## Aims & Scope

This letters journal addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Dr. Seb J. Savory
University of Cambridge