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# IEEE Photonics Technology Letters

## Filter Results

Displaying Results 1 - 25 of 34
• ### [Front cover]

Publication Year: 2014, Page(s): C1
| PDF (213 KB)
• ### IEEE Photonics Technology Letters publication information

Publication Year: 2014, Page(s): C2
| PDF (128 KB)
• ### Table of contents

Publication Year: 2014, Page(s):1063 - 1064
| PDF (114 KB)
• ### ${rm TiO}_{2}$ Nanoparticles Arrays Ultraviolet-A Detector With Au Schottky Contact

Publication Year: 2014, Page(s):1065 - 1068
Cited by:  Papers (3)
| | PDF (1020 KB) | HTML

We have demonstrated the synthesis of TiO2 nanoparticles (NPs) arrays on SiOx thin film using the glancing angle deposition technique. The deposited TiO2 NPs are 2-12 nm in size and have a density of ~2 × 1012 cm-2. The X-ray diffraction depicted that the TiO2 NPs are polycrystalline. An optical absorption measurement shows t... View full abstract»

• ### Active Fiber Gas Sensor for Methane Detecting Based on a Laser Heated Fiber Bragg Grating

Publication Year: 2014, Page(s):1069 - 1072
Cited by:  Papers (7)
| | PDF (623 KB) | HTML

An active optical fiber gas sensor was developed in a cobalt-doped single mode fiber. This fiber can be heated up to a few hundred degrees Celsius by a heating laser, and a fiber Bragg grating (FBG) was fabricated inside this fiber as a thermometer. The Bragg wavelength of the FBG is sensitive to the thermal conductivity of the gas surrounding the fiber and can be used to monitor the concentration... View full abstract»

• ### Failure Mechanism for GaN-Based High-Voltage Light-Emitting Diodes

Publication Year: 2014, Page(s):1073 - 1076
Cited by:  Papers (3)
| | PDF (885 KB) | HTML

We report a detailed reliability test study on GaN-based high-voltage light-emitting diodes. Under high temperature (i.e., 80°C) and high current injection (i.e., 100 mA) conditions, it was found that Al metal whiskers were formed from the sidewall of the Cr/Al/Ti/Pt/Au p-finger metal after 120-h burn-in test. It was also found that the whiskers became longer as we increased the burn-in tim... View full abstract»

• ### Mirror Reflector Actuated by Liquid Droplet

Publication Year: 2014, Page(s):1077 - 1080
Cited by:  Papers (1)
| | PDF (760 KB) | HTML Media

In this letter, we demonstrate a mirror reflector actuated by a liquid droplet. Four rectangular polymethyl methacrylate substrates are stacked to form the device structure. Three ITO electrodes are fabricated on the bottom substrate. One droplet is placed on the middle of the substrate and is surrounded by silicone oil. One side of the mirror is adhered to a rotating axis and the other side is im... View full abstract»

• ### Enhanced Ultraviolet Response of ${rm p}hbox{-}{rm Si}/{rm SiO}_{x}/{rm i}hbox{-}{rm ZnO}/{rm n}hbox{-}{rm ZnO}$ Photodetectors

Publication Year: 2014, Page(s):1081 - 1084
Cited by:  Papers (4)
| | PDF (704 KB) | HTML

Ultraviolet (UV) response of p-Si/i-ZnO/n-ZnO (p-i-n) heterojunction photodetectors (HPDs) was dramatically enhanced by inserting a thin SiOx layer to form a p-Si/SiOx/ i-ZnO/n-ZnO structure. It was found that the leakage current of p-i-n HPDs is largely reduced by about three orders compared with that of conventional p-n HPDs. Photocurrent measurements show that the UV-gener... View full abstract»

• ### Single Polarization, Dual Wavelength Fiber Laser Based on a 3-Stage All Fiber Lyot Filter

Publication Year: 2014, Page(s):1085 - 1088
Cited by:  Papers (3)
| | PDF (1581 KB) | HTML

We have demonstrated a switchable dual wavelength fiber ring laser with a high degree of polarization output by using an intracavity 3-stage all fiber Lyot filter. The filter is formed by concatenating four 45° tilted fiber gratings separated by polarization maintaining fibers with a length ratio of 1:2:4 (20, 40, and 80 cm), giving a compact integrated configuration with reduced bandwidth.... View full abstract»

• ### A Light Source Using 1.3- $mu{rm m}$ Lens-Integrated Surface-Emitting Laser for Silicon Platforms

Publication Year: 2014, Page(s):1089 - 1091
Cited by:  Papers (5)
| | PDF (862 KB) | HTML

As a solution to provide small-footprint and low-cost light sources for silicon platforms, light sources using a lens-integrated surface-emitting laser (LISEL), and a grating coupler fabricated on a silicon-on-insulator substrate is proposed. Light emitted from the LISEL (based on an InP distributed feedback laser) has a narrow far-field pattern, so the LISEL can be directly mounted on the silicon... View full abstract»

• ### Graphene-Based Birefringent Photonic Crystal Fiber Sensor Using Surface Plasmon Resonance

Publication Year: 2014, Page(s):1092 - 1095
Cited by:  Papers (27)
| | PDF (926 KB) | HTML

We propose a graphene-based photonic crystal fiber (PCF) sensor based on surface plasmon resonance. Graphene helps in prevention of oxidation of the silver layer used as a plasmonic active metal. The birefringent nature of the structure allows one component of the core guided mode to be more sensitive. Further, this structure does not need filling of the voids. The structural parameter of PCF and ... View full abstract»

• ### A Simplified Model for the Optimization of LC Photonic Elements

Publication Year: 2014, Page(s):1096 - 1099
Cited by:  Papers (1)
| | PDF (802 KB) | HTML

Recently, liquid crystal (LC) polarization gratings (PGs), because of several advantages, have become extremely popular although the process for analysis and optimization of different optical characteristics is still very complicated. Here, we reveal a simplified model (SM) to evaluate and optimize the performance of LCPGs. Unlike the existing extended Jones matrix (EJM) method, the SM excludes th... View full abstract»

• ### Reconfigurable Modal Gain Control of a Few-Mode EDFA Supporting Six Spatial Modes

Publication Year: 2014, Page(s):1100 - 1103
Cited by:  Papers (19)
| | PDF (926 KB) | HTML

We experimentally demonstrate an inline few-mode erbium doped fiber amplifier supporting six spatial modes with reconfigurable differential gain control and excellent gain flatness obtained through mode-selective bidirectional pumping of a custom fiber with a radially profiled erbium dopant distribution. A signal gain of >20 dB was obtained for all the guided modes with a differential modal gai... View full abstract»

• ### Dynamically Tunable Plasmon-Induced Transparency in Planar Metamaterials

Publication Year: 2014, Page(s):1104 - 1107
Cited by:  Papers (4)
| | PDF (1009 KB) | HTML

We propose a planar metamaterial design to realize active manipulation of plasmon-induced transparency. Under periodic boundary condition, a surface plasmon polaritons mode is excited by a plane wave with momentum conservation at oblique incidence. Due to the destructive interference between the surface plasmon polaritons mode and induction-capacitance resonance mode, an approximate 100% transpare... View full abstract»

• ### Study of Fiber Bragg Grating Spectral Overlapping for Laser Structures

Publication Year: 2014, Page(s):1108 - 1111
Cited by:  Papers (1)
| | PDF (691 KB) | HTML

In this letter, different parameters of the spectral overlapping filtering technique have been analyzed for laser structures. Despite the promising preliminary experimental results obtained using this filtering technique, the optimization of the fiber Bragg grating (FBG) parameters to reduce the bandwidth of the achieved filter depending on the fiber laser requirements and configuration, should be... View full abstract»

• ### High Channel-Count Ultra-Narrow Comb-Filter Based on a Triply Sampled Fiber Bragg Grating

Publication Year: 2014, Page(s):1112 - 1115
Cited by:  Papers (1)
| | PDF (691 KB) | HTML

Based on a sampled fiber Bragg grating (FBG) with simultaneous utilization of two amplitude-assisted phase sampling functions and a phase-only sampling (POS) function, a novel comb filter that has a high channel count and an excellent channel uniformity is first proposed. With the proposed method, an ultra-narrow FBG-based filter with consecutive 1377 channels, a channel bandwidth of 1.5 GHz, and ... View full abstract»

• ### Photonic Precoding for Millimeter-Wave Multicell MIMO in Centralized RoF System

Publication Year: 2014, Page(s):1116 - 1119
Cited by:  Papers (3)
| | PDF (1727 KB) | HTML

We propose a centralized photonic precoding method for millimeter-wave (MMW) multicell multiple-input multiple-output (MIMO) wireless communications. By applying the multicell MIMO and hence exploiting the spatial multiplexing gain over MMW, the system capacity is enhanced compared with the conventional single-input single-output (SISO) system. Based on radio-over-fiber (RoF) techniques, the multi... View full abstract»

• ### Dual-Wavelength Master Oscillator Power Amplifier Diode-Laser System at 785 nm

Publication Year: 2014, Page(s):1120 - 1123
Cited by:  Papers (2)
| | PDF (778 KB) | HTML

A dual-wavelength master oscillator (MO) power amplifier (PA) diode-laser system emitting at 785 nm suitable for shifted excitation Raman difference spectroscopy is presented. The laser system consists of a distributed Bragg reflector V-branch diode laser as a dual-wavelength MO and a ridge waveguide PA. The system reaches an optical output power of more than 750 mW at 25 °C. Optical spectr... View full abstract»

• ### Refractive Index and Temperature Sensor Based on Double-Pass M–Z Interferometer With an FBG

Publication Year: 2014, Page(s):1124 - 1127
Cited by:  Papers (9)
| | PDF (888 KB) | HTML

In order to measure the refractive index (RI) and temperature simultaneously, a double-pass in-line Mach-Zehnder interferometer (MZI) is proposed. The in-line MZI was formed by inscribing a pair of long period gratings in a single mode fiber. A fiber Bragg grating (FBG) was inscribed next to the output port of the MZI. Part of the MZI interference light was reflected by the FBG and the fiber end, ... View full abstract»

• ### Simultaneous Measurement of Temperature and Curvature Based on Hollow Annular Core Fiber

Publication Year: 2014, Page(s):1128 - 1131
Cited by:  Papers (6)
| | PDF (807 KB) | HTML

We propose a simultaneous temperature and curvature sensor based on a hollow annular core fiber (HACF) Mach-Zehnder interferometer (MZI). The MZI is fabricated by inserting a short section of HACF between two short pieces of multimode fibers, and interference occurs between the light beams transmitting along the air hole and annular core of the HACF. Curvature and temperature can be measured throu... View full abstract»

• ### Performance of Blue LEDs With N-AlGaN/N-GaN Superlattice as Electron-Blocking Layer

Publication Year: 2014, Page(s):1132 - 1135
Cited by:  Papers (5)
| | PDF (1660 KB) | HTML

The characteristics of InGaN-based blue light-emitting diodes (LEDs) with an AlGaN/GaN superlattice (SL) electron-blocking layer (EBL) of gradual Al molar fraction below the active region are analyzed numerically. The output power, internal quantum efficiency, electrostatic fields, energy band diagrams, carrier concentrations, radiative recombination, and electron leakage current are investigated.... View full abstract»

• ### High-Temperature Single Photon Detection Performance of 4H-SiC Avalanche Photodiodes

Publication Year: 2014, Page(s):1136 - 1138
Cited by:  Papers (9)
| | PDF (855 KB) | HTML

In this letter, the high-temperature performance of 4H-SiC avalanche photodiodes (APDs) working in Geiger mode is studied for the first time. At unity gain bias, the maximum quantum efficiency of the APD increases from 53.4% at 290 nm to 63.3% at 295 nm as temperature rises from room temperature to 150 °C. Meanwhile, the dark current of the APD before breakdown increases by more than two to... View full abstract»

• ### Loss Distribution Measurement of Broken PON by End-Reflection-Assisted Brillouin Analysis

Publication Year: 2014, Page(s):1139 - 1141
| | PDF (577 KB) | HTML

We present the monitoring of broken passive optical network branches using our proposed end-reflection-assisted Brillouin analysis technique, using weak end-reflection of -40 to -50 dB, which occurs at the broken fiber end. View full abstract»

• ### Constellation Expansion for Differentially Encoded 100G Transmission

Publication Year: 2014, Page(s):1142 - 1145
Cited by:  Papers (1)
| | PDF (791 KB) | HTML

Recent technological progress has enabled the implementation of powerful soft-decision forward error correction codes performing very close to the theoretical Shannon limit. However, recently we showed that, even when the most powerful binary codes are used, a significant potential gain remains unexploited in traditional, coherently detected, non differentially encoded, polarization division multi... View full abstract»

• ### Analysis of Quantum Radar Cross Section and Its Influence on Target Detection Performance

Publication Year: 2014, Page(s):1146 - 1149
Cited by:  Papers (1)
| | PDF (1094 KB) | HTML

Quantum radar is a new detection technology based on the mechanism of quantum physics and is promising for enhancing radar target detection capability. In this letter, the quantum radar equation is established based on the traditional radar equation; meanwhile, how the quantum radar cross section (QRCS) influences target detection performance and how QRCSs for some typical targets distribute are i... 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