Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals最新文献_第2页

Photosensitivity in multi-valent rare earth ion doped aluminosilicate glass optical fiber 多价稀土离子掺杂铝硅酸盐玻璃光纤的光敏性

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.jsue.18

K. Oh, U. Paek, T. Morse

引用次数: 0

Recoated temperature-insensitive long-period gratings 重涂温度不敏感长周期光栅

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.pdp3

A. Abramov, A. Hale, A. Vengsarkar

引用次数: 1

Rapid Thermal Annealing of Chalcogenide glasses for Photodarkened Waveguide and Grating Applications 用于光变暗波导和光栅的硫系玻璃的快速热退火

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.bmg.3

S. Ramachandran, S. G. Bishop

引用次数: 0

Improved Efficiency Narrow-Band Acoustooptic Tunable Reflector using Fibre Bragg Grating 利用光纤光栅改进效率的窄带声光可调谐反射器

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.pdp4

W.F. Liu, L. Dong, L. Reekie, D. Culverhouse, P. Russell

{"title":"Improved Efficiency Narrow-Band Acoustooptic Tunable Reflector using Fibre Bragg Grating","authors":"W.F. Liu, L. Dong, L. Reekie, D. Culverhouse, P. Russell","doi":"10.1364/bgppf.1997.pdp4","DOIUrl":"https://doi.org/10.1364/bgppf.1997.pdp4","url":null,"abstract":"All-fibre versions of bulk devices are very attractive in fibre systems where low insertion loss is always desirable. We have greatly improved the performance of a recently reported [1] Bragg-grating-based acousto-optic superiattice modulator (AOSLM) by reducing the fibre diameter by HF etching. This improves the overlap of acoustic and optical power, resulting in modulator efficiencies as high as 90%. The modulator produces narrow-band amplitude-adjustable reflections that can be tuned over several nm, which is attractive for WDM and laser applications. In the device, an extensional acoustic wave is launched along a fibre Bragg grating. The ensuing superiattice modulation causes additional bands of reflection to appear on both sides of the Bragg condition. The device works by coupling together the forward and backward propagating Bloch modes in the grating (a principle first proposed in 1986 [2,3]) and operates in reflection mode. This differentiates the AOSLM from all previously reported acousto-optic fibre devices, which all rely on intermodal coupling, examples being LP01 to LP11 coupling in dual-mode [4] and twin-core [5] fibres, four-port null-couplers [6], polarisation mode couplers in Hi-Bi fibre [7] and guided-to-cladding mode coupling in standard telecom fibre [8]. In all these devices the intermodal beat length L\u0000 B\u0000 = λ /(n1 – n2) at optical wavelength λ between two modes with phase indices n1, and n2 is matched by the acoustic wavelength v\u0000 s\u0000 / f\u0000 s\u0000 where v\u0000 s\u0000 and f\u0000 s\u0000 are the acoustic phase velocity and frequency.","PeriodicalId":182420,"journal":{"name":"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124212813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear response of gold nanoparticles embedded in glass matrix 嵌入在玻璃基体中的金纳米颗粒的非线性响应

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.jsue.31

H. Inouye, K. Tanaka, I. Tanahashi, K. Hirao

引用次数: 0

Fiber Grating Devices for WDM Communication Systems WDM通信系统用光纤光栅器件

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.btua.1

T. Strasser

引用次数: 0

Dynamics of Coupling Peaks by H2 Diffusion in Long-Period Grating Filters 长周期光栅滤光器中H2扩散耦合峰的动力学

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.bmg.10

J. Jang, K. Kwack, Sang-Bae Lee, S. Choi

{"title":"Dynamics of Coupling Peaks by H2 Diffusion in Long-Period Grating Filters","authors":"J. Jang, K. Kwack, Sang-Bae Lee, S. Choi","doi":"10.1364/bgppf.1997.bmg.10","DOIUrl":"https://doi.org/10.1364/bgppf.1997.bmg.10","url":null,"abstract":"It is now well known that germanium-doped silica fibers excellent photosensitivity. A UV source changes the refractive index of the core that contains germanium. A common type of defect formed in germanium-doped silica is GeO or oxygen deficient germania related defect [1], which is bonded to three oxygen atoms, and one bond is made to a silicon/germanium atom. This has been identified as giving rise to absorption centered around 240 nm. But, typically UV induced index changes have been limited to 3×10−5 for standard single mode fibers doped with 3% germania [2]. Increasing GeO2 doping concentration and reducing the amount of oxygen used in the fabrication of the preform also enhance the fiber photosensitivity [2]. In this case, the peak index changes are usually about 5×10−4 or less. More recently, two techniques have been proposed to enhance the photosensitivity of germanium-doped silica fibers : exposure of the material to the flame of an oxygen-hydrogen burner(flame brushing method) [3], and hydrogen loading at low temperature and high pressures [4]. Lemaire [4] showed 5.9×10−3 peak-to-peak index change in the case of 3% GeO2 loaded with 3.3% H2. In long-period grating filter fabrication, hydrogen treatment is needed to get high Δn for coupling a fundamental guided mode to the cladding leaky modes efficiently. Hydrogen treated germano-silicate fiber is unstable because of H2 diffusion process. We present the growth and decay behavior of the coupling peaks induced by H2 diffusion and annealing process for stabilization.","PeriodicalId":182420,"journal":{"name":"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals","volume":"402 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124589378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The role of extrinsic species on the nonlinear absorption of bulk and thin film sulfide glasses 外来物质对块状和薄膜硫化物玻璃非线性吸收的影响

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.jsue.8

T. Cardinal, K. A. Richardson, H. Shin, G. Stegeman, L. Glebov, J. Viens, A. Villeneuve

引用次数: 0

Fabrication of In-Fibre Moiré Filters Using a 5cm non-dedicated chirped phase mask 使用5cm非专用啁啾相位掩模制备光纤内莫尔滤光片

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.bmg.15

L. A. Evcrall, K. Sugden, J.A.R. Williams, I. Bennion, X. Liu, J. Aitchison, Richard M. De La Rue

引用次数: 2

Narrow Transmission Bandpass Filters Using Bragg Grating-Assisted Mode Conversion 使用布拉格光栅辅助模式转换的窄传输带通滤波器

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI: 10.1364/bgppf.1997.bmg.2

J. Canning, D. Moss

{"title":"Narrow Transmission Bandpass Filters Using Bragg Grating-Assisted Mode Conversion","authors":"J. Canning, D. Moss","doi":"10.1364/bgppf.1997.bmg.2","DOIUrl":"https://doi.org/10.1364/bgppf.1997.bmg.2","url":null,"abstract":"Fibre Bragg gratings are proving to be instrumental in enabling the introduction of WDM systems. They offer highly selective bandpass filtering needed for the transmission of multiple closely-spaced wavelengths. These gratings, however, tend to work in reflection since the large k-vector allows coupling from forward travelling modes to backward travelling modes. This has proved to be a major disadvantage since to operate in transmission requires the use of optical recirculators. However, gratings which operate using phase-matching in the forward direction tend to have long periods, determined by the beat length between two modes. Fundamental mode conversion [1,2] requires stripping of the higher order mode to achieve a loss bandpass. This is more readily achieved when conversion is to cladding modes [3]. Whilst these filters have very low reflections, they operate as loss filters and not transmission bandpass devices. Further, the loss bandwidth tends to be broad, on the order of 20nm, because of the small differences in modal dispersion [1-3]. On the other hand, grating dispersion has been used to achieve mode conversion in reflection over a small wavelength range [4]. In all these cases transmission notch filters are generally produced, whereas in most cases the opposite - a transmission bandpass filter - is desired.","PeriodicalId":182420,"journal":{"name":"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals","volume":"6 17","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120863547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0