Optical Components, Detectors, Displays, Sensors, Lasers, Integrated Optics

Experiments and analysis on Joule heating effect in field-assisted ion diffusion

Yinlei Hao, Bin Zheng, Hongjian Wang, Weiwei Zheng, Jianyi Yang et al.
Due to the Joule heating effect induced by the use of an assisting electric field, glass wafer temperature is experimentally found to increase synchronically with the flow of current during the process of field-assisted ion diffusion. A theoretical analysis demonstrates that the amplitude of the gla ... [Opt. Eng. 51, 014601 (2012)] published Thu Feb 9, 2012.

Cryogenic ceramic 277 watt Yb:YAG thin-disk laser

Natasa Vretenar, Tim C. Newell, Tyler Carson, Phillip Peterson, Tim Lucas et al.
A ceramic ytterbium:yttrium aluminum garnet (Yb:YAG) thin-disk laser is investigated at 15 degrees C (288 K) and also at 80 K, where it behaves as a four-level laser. We introduce a new two-phase spray cooling method to cool the Yb:YAG. One system relies on R134a refrigerant while the other uses liq ... [Opt. Eng. 51, 014201 (2012)] published Wed Feb 8, 2012.

Potentiality of using the singular approach for analysis of rough surfaces polarization-inhomogeneous laser images in diagnostics and classification of their optical properties

Yuriy A. Ushenko, Igor Z. Misevich, Anton P. Angelsky, and Olga Yu. Telenga
The results of investigation aimed at analysis of coordinate distributions for azimuths and ellipticity of polarization (polarization maps) in laser images of three types of phase-inhomogeneous layers are presented in this research, namely: rough, ground and bulk-scattering layers. Three groups of p ... [Opt. Eng. 51, 014301 (2012)] published Tue Feb 7, 2012.

Scale-reduction rule without drop in the sensitivity of a silicon-based guided-wave optical pressure sensor using a micromachined diaphragm

Masashi Ohkawa and Takashi Sato
In this study, an original scale-reduction rule without a drop in the sensitivity of a guided-wave optical pressure sensor was obtained using a micromachined diaphragm. The sensor has a rectangular diaphragm as a pressure-sensitive structure and a sensing waveguide across the diaphragm. Its sensitiv ... [Opt. Eng. 51, 014401 (2012)] published Tue Feb 7, 2012.

An 8 x 64 pixel dot matrix microdisplay in 0.35-[mu]m complementary metal-oxide semiconductor technology

Petrus J. Venter, Monuko du Plessis, Alfons W. Bogalecki, Marius E. Goosen, and Pieter Rademeyer
Microdisplay technologies for near-to-eye applications mostly use a complementary metal-oxide semiconductor (CMOS) processing chip as backplane for pixel addressing, with extensive post-processing on top of the CMOS chip to deposit organic LED or liquid crystal layers. Here, we examine the possibili ... [Opt. Eng. 51, 014003 (2012)] published Mon Feb 6, 2012.

Precise prediction of optical responses of liquid-crystal display products using a behavioral model of liquid crystal

Chansoo Park, Youngmin Cho, Jong-Man Kim, Jongbin Kim, and Seung-Woo Lee
We propose a precise circuit model to estimate transient optical responses of an active-matrix liquid crystal display (AMLCD). Liquid crystal (LC) molecules in the pixel is behaviorally modeled by using the first-order system that is described by Verilog-A. Capacitance-voltage (C-V) characteristics ... [Opt. Eng. 51, 014002 (2012)] published Mon Feb 6, 2012.

Novel design and alignment of wire-grid diffraction gratings on a visible focal plane array

Darren A. Miller, Daniel W. Wilson, and Eustace L. Dereniak
A pixelated, wire-grid diffraction grating is designed, fabricated, aligned, and mounted on an active focal plane array of a camera operating in the visible. The resulting design of the pixelated wire-grid polarizer array eschewed the need for fine translational alignments and drastically reduced cr ... [Opt. Eng. 51, 014001 (2012)] published Mon Feb 6, 2012.

Femtosecond laser printing of living cells using absorbing film-assisted laser-induced forward transfer

Bela Hopp, Tomi Smausz, Gabor Szabo, Lajos Kolozsvari, Dimitris Kafetzopoulos et al.
The applicability of a femtosecond KrF laser in absorbing film-assisted, laser-induced forward transfer of living cells was studied. The absorbing materials were 50-nm-thick metal films and biomaterials (gelatine, Matrigel, each 50 [mu]m thick, and polyhydroxybutyrate, 2 [mu]m). The used cell types ... [Opt. Eng. 51, 014302 (2012)] published Wed Feb 1, 2012.

Miniaturized nonincremental interferometric fiber-optic distance sensor for turning process monitoring

Florian Dreier, Philipp Gunther, Thorsten Pfister, and Jurgen Czarske
For in-process shape monitoring of rotating objects such as workpieces in a turning machine, contactless and compact sensors with high temporal resolution are necessary. For this challenging task, we developed a miniaturized and robust nonincremental interferometric fiber-optical distance sensor wit ... [Opt. Eng. 51, 014402 (2012)] published Wed Feb 1, 2012.

Electroactive polymer-based spatial light modulator with high reliability and fast response speed

Guangmin Ouyang, Kaiying Wang, Lars Henriksen, and Xuyuan Chen
An electroactive polymer (EAP)-based MOEMS spatial light modulator (SLM), which shows high reliability and fast response speed, is reported in this work. The reliability is achieved by designing the SLM without direct contact between electrodes and deformable EAP surface; while the fast response spe ... [Opt. Eng. 50, 124001 (2011)] published Mon Dec 5, 2011.

Fabrication of fiber-optic localized surface plasmon resonance sensor and its application to detect antibody-antigen reaction of interferon-gamma

Hyeon-Ho Jeong, Norov Erdene, Seung-Ki Lee, Dae-Hong Jeong, and Jae-Hyoung Park
A fiber-optic localized surface plasmon (FO LSPR) sensor was fabricated by gold nanoparticles (Au NPs) immobilized on the end-face of an optical fiber. When Au NPs were formed on the end-face of an optical fiber by chemical reaction, Au NPs aggregation occurred and the Au NPs were immobilized in var ... [Opt. Eng. 50, 124405 (2011)] published Fri Dec 2, 2011.

Rotational symmetric triangulation sensor based on an object space mirror

Haibo Zhang, Yongjie Zhang, Wei Tao, and Hui Zhao
As novel sensors, rotational symmetric triangulation sensors (RSTSs) have broad application potential because of their robustness and accuracy. However, existing RSTSs have the disadvantages of complicated structure and high cost. The current paper presents a novel RSTS based on an object space mirr ... [Opt. Eng. 50, 124401 (2011)] published Fri Dec 2, 2011.

Multifiber optical bend sensor to aid colonoscope navigation

Jessica E. Kesner, Robb M. Gavalis, Peter Y. Wong, and Caroline G. L. Cao
A colonoscopy's near-blind navigation process frequently causes disorientation for the scope operator, leading to harm for the patient. Navigation can be improved if real-time colonoscope shape, location, and orientation information is provided by a shape-tracking aid, such as a fiber optic bend sen ... [Opt. Eng. 50, 124402 (2011)] published Wed Nov 23, 2011.

Optical fiber sensors embedded in concrete for measurement of temperature in a real fire test

Antonio Bueno, Benjamin Torres, David Barrera, Pedro Antonio Calderon, Jose Manuel Lloris et al.
We present the results of a real fire test using optical fiber sensors embedded in concrete samples. The temperature curve used in this experiment is described in the Spanish/European standard UNE-EN 1363-1 temperature profile for normalized concrete resistance to real fire tests, reaching temperatu ... [Opt. Eng. 50, 124404 (2011)] published Fri Nov 18, 2011.

Development of an integrated narrowband tunable filter for LIDAR applications

Dionisio Alves Pereira, Francisco Manuel Moita Araujo, Luis Alberto de Almeida Ferreira, Jose Luis Santos, Manuel B. Marques et al.
The overall procedure toward the implementation of a compact tunable athermal filter mounted on a piezoelectric actuator and based on a pi-shift chirped fiber Bragg grating is presented. This package ensures an active tunablility over 2 nm with a cross thermal induced Bragg wavelength shift below 10 ... [Opt. Eng. 50, 124403 (2011)] published Thu Nov 17, 2011.

Quasi-single-sideband radio over fiber transmission with a polymer-based waveguide microring resonator

Xiuyou Han, Jianing Zhang, Linghua Wang, Yiying Gu, Meng Wang et al.
Integrated waveguide microwave photonic filters (MPFs) have the potential to bring down volume, weight, and power consumption of signal processing equipment besides the common advantages of discrete-component-based MPFs. A polysiloxane-liquid polymer-based optical wave-guide microring resonator was ... [Opt. Eng. 50, 124601 (2011)] published Wed Nov 16, 2011.

Effect of the operating characteristics parameters on the performance of a waveguide CO laser

Somayeh Mortazavi, Batol Sajad, Saeid Jelvani, Hedieh Pazokian, Mohsen Montazerolghaem et al.
In this paper, the influence of the operating parameters on the performance of a waveguide-CO laser was investigated. The output power versus discharge current, gas pressure, and gas mixture ratio were measured using a different tube design. Also, it is observed that the laser output wavelengths var ... [Opt. Eng. 50, 124201 (2011)] published Wed Nov 16, 2011.

Efficient diode-pumped Yb:LuYSiO laser mode locked by single-walled carbon nanotube absorber

Qi Yang, Danhua Liu, Jie Liu, Yonggang Wang, Jau Tang et al.
Efficient diode-pumped Yb:LuYSiO laser mode locked by single walled carbon nanotube saturable absorber is reported for the first time. Under the absorbed pump power of 12.83 W, continuous wave mode-locked pulses were generated with the maximum average output power of 1.50 W. We obtained pulses as sh ... [Opt. Eng. 50, 114202 (2011)] published Mon Nov 14, 2011.

Bends and splitters for self-collimated beams in two-dimensional triangular lattice photonic crystals

Zhenhai Wu, Kang Xie, Huajun Yang, and Ping Jiang
By introducing a line defect and a V-shaped defect into two-dimensional triangular lattice photonic crystals, a 60 deg beam bend, a Y-shaped beam slitter, and a one-to-three beam splitter are designed based on the self-collimation effect of photonic crystals (PCs). By analyzing the equi-frequency co ... [Opt. Eng. 50, 114002 (2011)] published Wed Nov 9, 2011.

Novel monitoring method of power transmission line galloping based on fiber Bragg grating sensor

Yangyang Chen, Zhiguo Zhang, and Xue Chen
A novel monitoring scheme based on the fiber Bragg grating sensor to achieve real-time, long-distance, and passive-support monitoring of the power transmission line galloping is proposed and experimentally demonstrated. Based on the relationship between galloping amplitude and horizontal tension of ... [Opt. Eng. 50, 114403 (2011)] published Thu Nov 3, 2011.

Optical tilt sensor with direct intensity-modulated scheme

Shuangshuang Zhao, Juan Zhang, Changlun Hou, Jian Bai, and Guoguang Yang
An optical tilt sensor based on a phase-sensitive diffraction grating with direct intensity-modulated scheme is proposed in this paper. The tilt sensor consists of a coherent light source, an integrated grating, a mechanical sensing part, and an optical signal processing circuit. The mechanical sens ... [Opt. Eng. 50, 114405 (2011)] published Thu Oct 27, 2011.