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# IEEE Photonics Technology Letters

## Filter Results

Displaying Results 1 - 25 of 40
• ### [Front cover]

Publication Year: 2012, Page(s): C1
| PDF (209 KB)
• ### IEEE Photonics Technology Letters publication information

Publication Year: 2012, Page(s): C2
| PDF (128 KB)

Publication Year: 2012, Page(s):1979 - 1980
| PDF (117 KB)
• ### Novel Demodulation Method for Fiber-Optic Interferometers Based on $pi/2$ Phase Modulation

Publication Year: 2012, Page(s):1981 - 1983
Cited by:  Papers (1)
| | PDF (769 KB) | HTML

This letter proposes a novel demodulation method for fiber-optic interferometer sensors. A fast square wave is added to the reference arm of the interferometer sensor in the form of phase modulation. Starting from this, we successfully developed a simple demodulation method that can greatly improve the conversion efficiency and overcome the unbalanced influences. Our experiment results show that a... View full abstract»

• ### A Bidirectional 60-GHz Wireless-Over-Fiber Transport System With Centralized Local Oscillator Service Delivered to Mobile Terminals and Base Stations

Publication Year: 2012, Page(s):1984 - 1987
Cited by:  Papers (13)
| | PDF (473 KB) | HTML

We propose a novel 60-GHz wireless-over-fiber (WoF) access system for multigigabit bidirectional data transmission. In conventional microwave wireless system designs, electrical local oscillator (LO) sources are required for frequency conversions in both base station (BS) and mobile terminal (MT), incurring considerable cost for system integration and maintenance at millimeter-wave frequencies. We... View full abstract»

• ### Teardrop Reflector-Assisted Unidirectional Hybrid Silicon Microring Lasers

Publication Year: 2012, Page(s):1988 - 1990
Cited by:  Papers (20)
| | PDF (503 KB) | HTML

We study directional bistability in hybrid silicon microring lasers and demonstrate a unidirectional laser. Unidirectional emission is achieved by integrating a passive reflector that feeds laser emission back into the laser cavity to introduce an extra unidirectional gain. We show that the length of the passive reflector is a critical parameter in determining the lasing behavior. View full abstract»

• ### Enhanced Optical Power of InGaN/GaN Light-Emitting Diode by AlGaN Interlayer and Electron Blocking Layer

Publication Year: 2012, Page(s):1991 - 1994
Cited by:  Papers (9)
| | PDF (657 KB) | HTML

We report on the effect of an AlGaN interlayer with a low Al composition, which is inserted between multiple quantum wells (MQWs) and an AlGaN electron blocking layer (EBL) in light-emitting diodes (LEDs). The band diagram shows that this interlayer reduces the hole barrier height between the last GaN barrier in MQWs and the AlGaN EBL to enhance the hole injection. The optical output power at 20 m... View full abstract»

• ### Solution-Processed Photoconductive UV Detectors Based on ZnO Nanosheets

Publication Year: 2012, Page(s):1995 - 1997
Cited by:  Papers (3)
| | PDF (667 KB) | HTML

A low-cost and complexity-free demonstration of two relatively fast ultraviolet (UV) detectors based on ZnO nanosheets are reported in this letter for the first time. Highly crystalline ZnO nanosheets have been synthesized by a sonochemical method. The proposed UV detectors were fabricated through coating the synthesized materials on Cu electrodes. Experimentally obtained responsivity, detectivity... View full abstract»

• ### Nonlinear Absorption at Optical Telecommunication Wavelengths of InN Films Deposited by RF Sputtering

Publication Year: 2012, Page(s):1998 - 2000
Cited by:  Papers (3)
| | PDF (395 KB) | HTML

We report on the nonlinear optical absorption of InN films deposited on GaN templates by radio-frequency (RF) sputtering. The layers are characterized through the pump-probe technique at 1.55 μm, by obtaining a nonlinear absorption coefficient of 167±30 cm/GW with a nonlinear response recovery time of 380 fs. This nonlinear behavior is attributed to a two-photon absorption process fo... View full abstract»

• ### Photonic Generation of Precisely $pi$ Phase-Shifted Binary Phase-Coded Microwave Signal

Publication Year: 2012, Page(s):2001 - 2004
Cited by:  Papers (20)
| | PDF (1542 KB) | HTML

A novel photonic approach to generating a precisely π phase-shifted binary phase-coded microwave signal is proposed and experimentally demonstrated. A phase modulator is employed to generate two ±1st-order sidebands and an optical carrier. Due to the inherent ±π/2 phase shifts of the two ±1st-order sidebands, a binary phase-coded microwave signal with a precise p... View full abstract»

• ### Time Division Multiplexing Optical Time Domain Reflectometry Based on Dual Frequency Probe

Publication Year: 2012, Page(s):2005 - 2008
| | PDF (421 KB) | HTML

A new frequency coding method is proposed and experimentally demonstrated that employs a phase modulator driven by sequential radio frequency and a synchronously controlled acoustooptic modulator to generate time division multiplexing probe pulses for coherent optical time domain reflectometry (C-OTDR). Each probe pulse contains two probe frequencies that are symmetrical regarding the frequency of... View full abstract»

• ### Experimental Investigations of 3-D-/4-D-CAP Modulation With Directly Modulated VCSELs

Publication Year: 2012, Page(s):2009 - 2012
Cited by:  Papers (20)
| | PDF (4065 KB) | HTML

In this letter, we present experimental investigations of multidimensional multilevel carrierless amplitude phase (CAP) modulation with directly modulated vertical cavity surface-emitting lasers. The signals are transmitted over 20 km of standard single-mode fiber (SSMF). For multilevel 3-D-CAP, bit rates of 468.75 and 937.5 Mb/s are achieved at two levels/dimension and four levels/dimension, resp... View full abstract»

• ### Light-Extraction Enhancement by Cavity Array-Textured N-Polar GaN Surfaces Ablated Using a KrF Laser

Publication Year: 2012, Page(s):2013 - 2015
Cited by:  Papers (2)
| | PDF (1671 KB) | HTML

The creation of KOH-etched pyramidal patterns on the N-GaN surface is considered to be the most effective texturing method for improving the light-extraction efficiency of GaN LEDs. Using KrF-laser ablation, concave downward cavities are formed on the N-GaN surface. This letter demonstrates that KrF-laser-ablated cavities enhance the light-extraction efficiency of the KOH-etched pyramidal N-GaN su... View full abstract»

• ### Analytical Fiber-Optic Channel Model in the Presence of Cross-Phase Modulation

Publication Year: 2012, Page(s):2016 - 2019
Cited by:  Papers (26)
| | PDF (264 KB) | HTML

A simple but accurate analytical model for the fiber-optic channel affected by cross-phase modulation (XPM) is proposed and validated through numerical simulations. The model describes XPM as a time-varying and frequency-selective complex fading, whose impact and statistical properties can be analytically investigated. As an example, the proposed model is applied to derive an analytic lower bound ... View full abstract»

• ### Enlarged Photodetection Using ${rm SiO}_{x}$ Nanowire Arrays

Publication Year: 2012, Page(s):2020 - 2023
Cited by:  Papers (13)
| | PDF (1359 KB) | HTML

We have synthesized perpendicular SiOx nanowire (NW) arrays on Si substrates and investigated them using scanning electron microscopy. Transmission electron microscopy and energy-dispersive spectroscopy have been used to investigate the single NW structure. A near-infrared emission at 700 nm is observed. In/SiOx NW and In/SiOx thin film (TF) contacts exhibit Schott... View full abstract»

• ### Bidirectional Hybrid OFDM-WDM-PON System for 40-Gb/s Downlink and 10-Gb/s Uplink Transmission Using RSOA Remodulation

Publication Year: 2012, Page(s):2024 - 2026
Cited by:  Papers (9)
| | PDF (387 KB) | HTML

We experimentally demonstrate a bidirectional hybrid orthogonal frequency-division-multiplexing wavelength-division-multiplexing passive optical network (OFDM-WDM-PON) system. The proposed scheme uses OFDM signals occupying different portions of the available signal spectrum for uplink and downlink signal transmissions to reduce the effects of Rayleigh backscattering, chromatic dispersion, and pow... View full abstract»

• ### Large Port Count Wavelength Routing Optical Switch Consisting of Cascaded Small-Size Cyclic Arrayed Waveguide Gratings

Publication Year: 2012, Page(s):2027 - 2030
Cited by:  Papers (12)
| | PDF (4885 KB) | HTML

We propose a highly scalable switch architecture suitable for client-side cross-connect switches in reconfigurable optical add/drop multiplexers and optical switching in data centers. It consists of cascaded cyclic arrayed waveguide gratings (AWGs). We develop a 270 × 270 prototype switch consisting of an assembly of arrayed small switches and couplers and AWGs that are fabricated on planar... View full abstract»

• ### CMOS Compatible Silicon-on-Insulator Polarization Rotator Based on Symmetry Breaking of the Waveguide Cross Section

Publication Year: 2012, Page(s):2031 - 2034
Cited by:  Papers (15)
| | PDF (411 KB) | HTML

A polarization rotator in silicon-on-insulator technology based on breaking the symmetry of the waveguide cross section is reported. The 25- μm-long device is designed to be integrated with standard grating couplers without the need for extra fabrication steps. Hence, fabrication is carried out by a 2-etch-step complementary metal-oxide-semiconductor compatible process using 193-nm deep ult... View full abstract»

• ### Performance Improvement of OOK Free-Space Optical Communication Systems by Coherent Detection and Dynamic Decision Threshold in Atmospheric Turbulence Conditions

Publication Year: 2012, Page(s):2035 - 2037
Cited by:  Papers (7)
| | PDF (280 KB) | HTML

In this letter, we analyze the performance improvement of on-off-keying free-space optical communication systems in atmospheric turbulence conditions due to coherent detection and the dynamic decision threshold (DDT) scheme. Our analytical results show that the DDT scheme provides a 5.7-dB power reduction for achieving a bit error rate of 10-3 compared with the conventional fixed decisi... View full abstract»

• ### Lateral Stress Detection Using a Tapered Fiber Mach–Zehnder Interferometer

Publication Year: 2012, Page(s):2038 - 2041
Cited by:  Papers (1)
| | PDF (901 KB) | HTML

In this letter, a novel approach to measure local lateral stress using a tapered fiber Mach-Zehnder interferometer (TFMZI) is proposed and demonstrated. The transmission spectra of the TFMZI are measured under different transverse pressures and loading positions. The responses of the TFMZI are analyzed in a spatial frequency domain by fast Fourier transform of the corresponding transmission spectr... View full abstract»

• ### Performance Evaluation of CDMA-DMT for 1-mm SI-POF Short-Range Transmission Links

Publication Year: 2012, Page(s):2042 - 2045
Cited by:  Papers (1)
| | PDF (332 KB) | HTML

In this letter, the code division multiple access discrete multitone (CDMA-DMT) modulation scheme is experimentally investigated for transmission over an intensity modulation direct-detection link of 100 m of 1-mm polymethyl methacrylate step-index plastic optical fibers. CDMA-DMT is a multicarrier modulation scheme combining the merits of both CDMA and DMT and in which CDMA is utilized to perform... View full abstract»

• ### Performance Improvement of 40-Gb/s Electroabsorption Modulator Integrated Laser Module With Two Open-Circuit Stubs

Publication Year: 2012, Page(s):2046 - 2048
Cited by:  Papers (2)
| | PDF (565 KB) | HTML

In this letter, we propose and demonstrate a compact, low-cost, and easy to manufacture microstrip line with two open-circuit stubs to alleviate impedance mismatching of a packaged 40-Gb/s electroabsorption modulator integrated laser (EML) module. For comparison, two 1550-nm EML modules are fabricated, the only difference being that one of them is made with open-circuit stubs, while the other is n... View full abstract»

• ### Variation of Relative Intensity Noise With Optical Power in InGaAsP Semiconductor Optical Amplifier

Publication Year: 2012, Page(s):2049 - 2051
Cited by:  Papers (5)
| | PDF (1018 KB) | HTML

Relative intensity noise (RIN) is an index to evaluate the amount of noise compared to the optical intensity, which is widely believed to be increased by optical amplification. A previous paper, however, pointed out that theoretically the RIN of the output light of a semiconductor optical amplifier can be reduced from that of the input light, and that the RIN level is determined by the output opti... View full abstract»

• ### Effect of Paired Apertures in a Periodic Hole Array on Higher Order Plasmon Modes

Publication Year: 2012, Page(s):2052 - 2055
Cited by:  Papers (3)
| | PDF (964 KB) | HTML

We demonstrate that the transmission of higher-order surface plasmon modes in the mid-infrared range can be enhanced through rectangular hole array on the basis of paired apertures. Experiments prove that enhanced high-order transmission can be generated by either identical shapes or combinations of different hole shapes in pairs. The structure factor is adopted to explain the observed intensity o... View full abstract»

• ### Honeycomb Photonic Crystal Waveguides in a Suspended Silicon Slab

Publication Year: 2012, Page(s):2056 - 2059
Cited by:  Papers (3)
| | PDF (737 KB) | HTML

We report experimental evidence of light guiding at telecommunication wavelengths along line-defect honeycomb-lattice photonic crystal waveguides created in suspended silicon slabs. Numerical results show that the guided bands correspond to modes below the cladding light line so they are inherently lossless, although the measurements show quite high losses owing to fabrication imperfections. Honey... View full abstract»

## Aims & Scope

IEEE Photonics Technology Letters 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
Prof. Jianping Yao
University of Ottawa