Results 61 to 70 of about 15,530 (219)
Guangtongxin yanjiu, 2019 针对现有的光时域反射仪（OTDR）在监测带有掺铒光纤放大器（EDFA）的长途多跨段光纤链路时,为克服EDFA增益的波动需增加一个额外的补光来保持功率稳定的问题,文章基于线性调频OTDR提出了一种无需补光穿越EDFA的长途多跨段光纤监测技术。该技术利用线性调频准连续光作为探测光,可以避免EDFA增益的波动。同时通过分数域傅里叶滤波来去除级联EDFA累积的自发辐射白噪声,从而提高接收信号的信噪比。实验结果表明,该技术能够准确地测出中长途多跨段光纤链路中EDFA和连接点处的反射事件。
王强 +7 more
doaj
Demonstration of multi-cavity optoelectronic oscillators based on multicore fibers
, 2017 We report the first experimental demonstration of multi-cavity optoelectronic oscillators where the different cavities are hosted in a single multicore fiber.
Garcia, Sergi +2 more
core +1 more source
Suppression of beating noise of narrow-linewidth erbium-doped fiber ring lasers by use of a semiconductor optical amplifier [PDF]
, 2003 Beating noise in narrow-linewidth erbium-doped fiber ring lasers puts severe limitations on applications of the lasers. We demonstrate the suppression of beating noise in fiber ring lasers by using a semiconductor optical amplifier in the laser cavity ...
Baby, Varghese +3 more
core +1 more source
Multi‐Soliton Microcombs Enable Ultrafast Nanometric‐Precision Ranging and Photon‐Level Detection
Advanced Science, Volume 13, Issue 12, 27 February 2026.Our work first demonstrates dual‐multi‐soliton ranging and confirms its multifunctional capability. The method achieves ultrafast and nanometric‐precision measurement. For practical applications, we further extend the multi‐soliton states to photon‐level ranging.
Jiawen Zhi +10 more
wiley +1 more source
Guangtongxin yanjiu, 2001 文章给出了计算 OXC级联信噪比的一般解析模型 ,并针对“信号功率均衡”和“总功率均衡”两种方案进行了研究 ,分析了在这两种特定情况下系统的信噪比特性 .同时还给出了OXC中输入 EDFA和输出 EDFA特性对系统信噪比的不同影响 ,得出了在设计 OXC时对输入 EDFA和输出 ...
秦涛 +4 more
doaj
Guangtongxin yanjiu, 1999 本文阐述了ＤＷＤＭ 系统对ＥＤＦＡ 的要求和ＥＤＦＡ 为达到这些要求的几种实现方法。并给出了ＤＷＤＭ 用ＥＤＦＡ 级联和增益锁定的实验结果。
龙浩, 黄宣泽, 张学勇, 印新达
doaj
Low power laser generated ultrasound : signal processing for time domain data acquisition [PDF]
, 2010 The use of low power modulated laser diode systems has previously been established as a suitable method for non-destructive laser generation of ultrasound.
Armstrong, I. +6 more
core
Generation of wavelength tunable optical pulses with SMSR exceeding 50 dB by self-seeding a gain-switched source containing two FP lasers [PDF]
, 2003 In this letter, we show the generation of shorter pulses (∼20 ps) that exhibit side mode suppression ratios (SMSR's) greater than 50 dB and wider tuning range (48.91 nm). Our technique is based on the self-seeding of a gain-switched source containing two
Anandarajah, Prince M. +3 more
core +1 more source
Laser &Photonics Reviews, Volume 20, Issue 3, 5 February 2026.High‐sensitivity, high‐resolution stimulated Raman photoacoustic spectroscopy is achieved by coupling continuous‐wave pump and Stokes beams to a high‐finesse optical cavity. This approach successfully resolves the narrow Raman rotational transition S0(0) of H2 with sub‐kHz spectral resolution and attains an unprecedented sensitivity of 0.5 ppm using ...
Qinxue Nie +3 more
wiley +1 more source
Inhomogeneous Gain Saturation in EDF: Experiment and Modeling [PDF]
, 2011 Erbium-Doped Fiber Amplifiers can present holes in spectral gain in Wavelength Division Multiplexing operation. The origin of this inhomogeneous saturation behavior is still a subject of controversy.
Boivin, David +4 more
core +3 more sources