Fiber Optics, Optical Communication, Optical Computing, Data Storage, Interconnects, Interferometry, Holography http://scitation.aip.org/ Fiber Optics, Optical Communication, Optical Computing, Data Storage, Interconnects, Interferometry, Holography Optimization of fiber Raman amplifier in a gain saturation regime http://link.aip.org/link/?JOE/51/015005/1&agg=rss Adish Bindal and Surinder Singh<br/> We investigated Raman gain spectrum and its dependence on Stoke's shift for fiber Raman amplifiers (FRAs). We determined that the Raman gain spectrum is fairly broad with a gain variation of less than 1 dB from the pump wavelength of 1440 to 1460 nm with maximum gain at 1451.2 nm, which corresponds ... [Opt. Eng. 51, 015005 (2012)] published Tue Feb 7, 2012. Novel reconnection method of incoherent optical fiber bundle pre-calibrated for image transmission in industrial hazardous environments http://link.aip.org/link/?JOE/51/015001/1&agg=rss Olivier Demuynck and Jose Manuel Menendez<br/> Complying with security certifications in most harsh industrial areas is usually very expensive and sometimes hinders the industrialization of new technologies. Thus, we observe in the modern industry an increasing need for visual inspection and closed monitoring systems, either manual (direct and p ... [Opt. Eng. 51, 015001 (2012)] published Tue Feb 7, 2012. Using a 1.2 GHz bandwidth reflective semiconductor optical amplifier with seeding light by 64-quadrature amplitude modulation orthogonal frequency division multiplexing modulation to achieve a 10-gbits/s upstream rate in long-reach passive optical network access http://link.aip.org/link/?JOE/51/015004/1&agg=rss Chien-Hung Yeh, Hsing-Yu Chen, Chi-Wai Chow, and Yu-Fu Wu<br/> We use a commercially available 1.2 GHz bandwidth reflective semiconductor optical amplifier (RSOA)based optical network unit (ONU) to achieve 10-gbits/s upstream traffic for an optical orthogonal frequency division multiplexing (OFDM) long-reach passive optical network (LR-PON). This is the first t ... [Opt. Eng. 51, 015004 (2012)] published Mon Feb 6, 2012. Long-distance quantum communications with superactivated Gaussian optical quantum channels http://link.aip.org/link/?JOE/51/015003/1&agg=rss Laszlo Gyongyosi and Sandor Imre<br/> The superactivation of zero-capacity optical quantum channels makes it possible to use two zero-capacity optical quantum channels, with a positive joint capacity at the output. Here we show, that noisy Gaussian quantum channels with the help of entanglement and coherent optical devices, can be used ... [Opt. Eng. 51, 015003 (2012)] published Mon Feb 6, 2012. Improved direct binary search-based algorithm for generating holograms for the application of holographic optical tweezers http://link.aip.org/link/?JOE/51/015801/1&agg=rss XuDong Zhao, Jing Li, Tao Tao, Qian Long, and Xiaoping Wu<br/> This paper presents an improved direct binary search (DBS)-based algorithm for generating holograms to holographic optical tweezers. The simulations show that the improved algorithm greatly enhances computation speed while maintaining high hologram efficiency and high-intensity homogeneous target sp ... [Opt. Eng. 51, 015801 (2012)] published Mon Feb 6, 2012. Interferometric assessment of induced nonlinear susceptibility in perturbed single-mode optical fiber for all-optical switching http://link.aip.org/link/?JOE/51/015007/1&agg=rss Fouad El-Diasty<br/> The induced variations of complex third-order susceptibilities in bent single-mode fiber at the standard operating wavelengths, 1300 and 1550 nm, is studied using Fizeau interferometry for radius of curvature ranges from 5 to 11 mm. At lambda=1300 nm and at the minimum radius of curvature R=5 mm, ... [Opt. Eng. 51, 015007 (2012)] published Wed Feb 1, 2012. Dispersion-compensated Raman/erbium-doped fiber hybrid amplifier with all-optical gain-clamped for wavelength-division multiplexing systems http://link.aip.org/link/?JOE/51/015002/1&agg=rss Jeng-Cherng Dung, Bing-Sheng Wu, and You-Ren Jian<br/> This study demonstrates a broadband gain-clamped and gain-flattened dispersion-compensated Raman/erbium-doped fiber hybrid amplifier that recycles residual Raman pump power using a single fiber Bragg grating for wavelength-division multiplexing systems. The optimum gain-clamped wavelength was 1564 n ... [Opt. Eng. 51, 015002 (2012)] published Wed Feb 1, 2012. Long-reach transmission experiment of a wavelength division multiplexed-passive optical networks transmitter based on reflective semiconductor optical amplifiers http://link.aip.org/link/?JOE/51/015008/1&agg=rss Sie-Wook Jeon, Youngbok Kim, and Chang-Soo Park<br/> We propose and demonstrate a long-reach wavelength division multiplexed-passive optical networks (WDM-PON) based on reflective semiconductor optical amplifiers (RSOAs) with easy maintenance of the optical source. Unlike previous studies the proposed WDM-PON uses two RSOAs: one for wavelength-selecte ... [Opt. Eng. 51, 015008 (2012)] published Wed Feb 1, 2012. Design and characterization of large-core optical fiber for Light Peak applications http://link.aip.org/link/?JOE/51/015006/1&agg=rss Chi-Wai Chow, Chien-Hung Yeh, Ling-Gang Yang, Jiun-Yu Sung, Sung-Ping Huang et al.<br/> Bandwidth demand for transferring data among different consumer electronic products is increasing rapidly. Due to issues of high propagation loss, electromagnetic interference, and limited bandwidth-distance product of the present copper-based electrical cables, consumer electronic devices may not p ... [Opt. Eng. 51, 015006 (2012)] published Tue Jan 31, 2012. Study on the performance of eosin-doped poly(vinyl alcohol)/acrylamide photopolymer films for holographic recording using 488-nm wavelength http://link.aip.org/link/?JOE/50/125802/1&agg=rss Chelakkal Sukumaran Rajesh, Sasidharan Savithrydevi SreeRoop, Vayalamkuzhi Pramitha, Rani Joseph, Krishnapillai Sreekumar et al.<br/> This article reports a study done on eosin-doped poly(vinyl alcohol)/acrylamide films for holographic recording using 488 nm Ar laser. Films were fabricated using gravity settling method at room temperature and were stored under normal laboratory conditions. Ar laser (488 nm) was used for fringe rec ... [Opt. Eng. 50, 125802 (2011)] published Thu Dec 1, 2011. 40 Gb/s onoff keying downstream and 10 Gb/s onoff keying remodulated upstream signals in long-reach access network with multivideo services http://link.aip.org/link/?JOE/50/125008/1&agg=rss Chien-Hung Yeh, Chi-Wai Chow, Yen-Liang Liu, and Ci-Ling Pan<br/> In this demonstration, we propose and investigate a long reach passive optical network (PON) using four wavelength-multiplexed signals with both onoff keying modulations for 40 Gb/s downlink traffic in 100 km fiber transmission without dispersion compensation. In the exchange node, we can use four c ... [Opt. Eng. 50, 125008 (2011)] published Wed Nov 23, 2011. Dispersion tolerance of Miller signal in optical domain http://link.aip.org/link/?JOE/50/125007/1&agg=rss Sanjeev Kumar Metya, Vijay Janyani, and Shri Gopal Modani<br/> An optical Miller coding scheme is proposed with the help of high speed electrical logic gates. With both Miller and Manchester being from the same family of code, i.e., 1B/2B, the former has less electrical spectrum compared with that of Manchester coding and thereby demonstrates a relatively highe ... [Opt. Eng. 50, 125007 (2011)] published Fri Nov 18, 2011. High-terahertz-frequency carrier generation by optical pulse for radio-over-fiber applications http://link.aip.org/link/?JOE/50/125005/1&agg=rss Abdolkarim Afroozeh, Rangsan Jomtarak, Jalil Ali, and Preecha P. Yupapin<br/> In this study a new design of terahertz frequency carrier generation for radio frequency identification (RFID) application is proposed. The dense wavelength-division multiplexing can be generated and obtained by using a Gaussian or soliton pulse propagating within a modified adddrop filter known as ... [Opt. Eng. 50, 125005 (2011)] published Fri Nov 18, 2011. C+L band wavelength division multiplexing access network with distributed-controlled protection architecture http://link.aip.org/link/?JOE/50/125006/1&agg=rss Chien Hung Yeh and Chi Wai Chow<br/> In this work, we propose and experimentally demonstrate a novel distributed-controlled protection architecture for automatic and fast network restoration in wavelength division multiplexing-passive optical network (WDM-PON). The proposed scheme can support both C and L bands. Besides, duplication of ... [Opt. Eng. 50, 125006 (2011)] published Fri Nov 18, 2011. Superfluorescent fiber source achieving multisignal power equalization in distributed fiber Bragg grating sensing http://link.aip.org/link/?JOE/50/125004/1&agg=rss Ying-Gang Liu, Zhen-An Jia, Xue-Guang Qiao, Hong-Liang Wang, Wei Zhang et al.<br/> In order to achieve multisignal power equalization in a quasidistributed fiber Bragg grating (FBG) sensing system, an erbium-doped fiber (EDF) superfluorescent source with high flatness and broadband spectrum is presented using a three-stage double-pump configuration. The spectral protrusions in the ... [Opt. Eng. 50, 125004 (2011)] published Thu Nov 17, 2011. Photonic crystal fiber with two triangular arrays of semiminor-axis-decreasing elliptical air holes for single-polarization single-mode operation http://link.aip.org/link/?JOE/50/125003/1&agg=rss Hongjun Zheng, Chongqing Wu, Shanliang Liu, Huishan Yu, Xin Li et al.<br/> A novel hexagonal lattice photonic crystal fiber (PCF) design with two triangular arrays of semiminor-axis-decreasing elliptical air holes is proposed in this paper. The PCF characteristics based on the full-vector finite element method with perfect matched layer boundary conditions show that a wide ... [Opt. Eng. 50, 125003 (2011)] published Thu Nov 17, 2011. Ultrafast two-bit all-optical analog-to-digital conversion based on femtosecond soliton sequence sampling http://link.aip.org/link/?JOE/50/125001/1&agg=rss Aida Esmaeilian-Marnani, Ahmad Fauzi Abas, Mohd Adzir Mahdi, and Khairulmizam Samsudin<br/> Realization of two-bit all-optical analog-to-digital conversion for an analog signal sampled by a femtosecond soliton sequence is investigated. Two approaches are suggested. The first one is based on filtering the broadened soliton spectrum after evolution over half of the soliton period in a standa ... [Opt. Eng. 50, 125001 (2011)] published Thu Nov 17, 2011. Holding time aware differentiated protection method for survivable waveband switching optical networks http://link.aip.org/link/?JOE/50/125002/1&agg=rss Weigang Hou, Lei Guo, Yan Li, and Tengfei Wu<br/> Due to the number of wavelengths in fibers increasing, the transmission ports consumed in optical cross-connect (OXC) are greatly enhanced. To reduce the complexity and the cost of OXC, waveband switching technology is proposed. At the same time, since an optical channel carries a lot of traffic, it ... [Opt. Eng. 50, 125002 (2011)] published Thu Nov 17, 2011. Phase analysis with autoregressive modeling in holographic interferometry http://link.aip.org/link/?JOE/50/125801/1&agg=rss Ali Boukellal, Rabah Mokdad, Farid Ait Ouamer, Pierre Pfeiffer, and Omar Lamrous<br/> An autoregressive method to analyze the fringe pattern observed in holographic interferometry is reported. Considering the impact of a 30 dB signal-to-noise ratio, we have shown that the reconstruction of the simulated symmetric profiles with 3, 4, and 5 fringes produces a maximum error of 0.300, 0. ... [Opt. Eng. 50, 125801 (2011)] published Thu Nov 17, 2011. Magnification of three-dimensional optical image without distortion in dynamic holographic projection http://link.aip.org/link/?JOE/50/115801/1&agg=rss Jia Jia, Yongtian Wang, Juan Liu, Xin Li, and Jinghui Xie<br/> We propose a simple technique to enlarge the reconstructed three-dimensional (3D) optical image and shorten the reconstructed distance simultaneously in real time holographic projection using a conventional lens or concave reflecting mirror based on the optical reversibility theorem. The main factor ... [Opt. Eng. 50, 115801 (2011)] published Thu Oct 27, 2011. Monte Carlo simulation for coupling between single-mode fiber and slab waveguide with spherical fiber microlenses http://link.aip.org/link/?JOE/50/115001/1&agg=rss Shuping Li, Yuzhou Sun, Jingping Zhu, and Tiantong Tang<br/> For the butt-joint coupling between a single mode fiber (SMF) and a single mode dielectric slab waveguide (SMDSW) with a spherical fiber microlens (SFML), because the SMF and the rectangular-section SMDSW have different symmetry, it is difficult to calculate the coupling efficiencies using the tradi ... [Opt. Eng. 50, 115001 (2011)] published Thu Oct 27, 2011.