Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Daoping Wei"'
Publikováno v:
Adaptive Optics Systems VI.
We report a 100-W continuous-wave (CW) 1178-nm narrowband polarization-maintaining (PM) Raman fiber amplifier (RFA) based on ESO’s patented RFA technology. A linearly-polarized 15-mW narrow-linewidth 1178-nm seed laser was amplified in a two-stage
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddb15fbf3b2cf7a400319810cf40c437
https://doi.org/10.1117/12.2312114
https://doi.org/10.1117/12.2312114
Autor:
Vladimir Karpov, Daoping Wei, Robin Schwerdt, Patrick Leisching, Wallace R. L. Clements, Axel Friedenauer, Bernhard Ernstberger, Wilhelm Kaenders, Martin Enderlein
Publikováno v:
SPIE Proceedings.
The performance of large ground-based optical telescopes is limited due to wavefront distortions induced by atmospheric turbulence. Adaptive optics systems using natural guide stars with sufficient brightness provide a practical way for correcting th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5bb58b6acc086f03bf0e5f9192a2c6f
https://doi.org/10.1117/12.2194874
https://doi.org/10.1117/12.2194874
Publikováno v:
Czechoslovak Journal of Physics. 51:155-162
Connecting an input port and an output port of a single-mode fiber coupler to form a fiber-loop, and making the time delay of the fiber-loop odd multiple of the half-period of the input optical pulse stream, we can obtain a pulse stream with multiply
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66208499fc438d12aae321936a4e864a
https://doi.org/10.1023/a:1002857517623
https://doi.org/10.1023/a:1002857517623
Publikováno v:
Science in China Series E: Technological Sciences. 42:165-170
A novel method utilizing a cantilever beam to tune the center wavelength and the linear chirp of fiber gratings is presented. Based on this method, the center wavelength and the chirp of a 10 cm uniform fiber grating are tuned to compensate for the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da09b286066a5006fd21c660f10bc539
https://doi.org/10.1007/bf02917111
https://doi.org/10.1007/bf02917111
Autor:
Wilhelm Kaenders, Daoping Wei, Bernhard Ernstberger, Axel Friedenauer, Manfred Hager, Vladimir Karpov, Wallace R. L. Clements
Publikováno v:
SPIE Proceedings.
Large telescopes equipped with adaptive optics require 20-25W CW 589-nm sources with emission linewidths of ~5 MHz. These Guide Star (GS) lasers should also be highly reliable and simple to operate and maintain for many years at the top of a mountain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::419437533d39ea939faf0b906b89573b
https://doi.org/10.1117/12.923869
https://doi.org/10.1117/12.923869
Publikováno v:
SPIE Proceedings.
In contrast with conventional polarization maintaining fibers, a simple Ge-doped single-mode fiber is used to generate tunable femtosecond soliton pulses. Soliton self-wavelength-shift up to 200 nm is achieved in a 17 m long fiber. The generated “m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c964f46533ca93c1262ce7857391504c
https://doi.org/10.1117/12.588350
https://doi.org/10.1117/12.588350
Publikováno v:
Fiber Optic Components and Optical Communication II.
Principle of biconically fused fiber polarization beainsplitters (FPBS) has been introduced in this paper, and a new method for fabricating FPBS has been presented. Compared with the conventional methods in which the first polarization modulation wai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91b5f647c85f80460f66291bd6171ff4
https://doi.org/10.1117/12.318017
https://doi.org/10.1117/12.318017
Publikováno v:
Fiber Optic Components and Optical Communication II.
The polarization characteristics of a twisted DBR fiber laser are investigated. Analytic formulae for the polarization-mode beat frequency and polarization direction are derived.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::181b6370ed7ef261287d10c902e3b6a7
https://doi.org/10.1117/12.318057
https://doi.org/10.1117/12.318057
Publikováno v:
Fiber Optic Components and Optical Communication II.
Based on analyzing the shortages of fabricating OTDM devices by means of conventional technology ot fabricating fiber coupler. We propose some novel methods to improve the device performance. Including: more accuracy splitting ratio by using 2X2 coup
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9745a6fd6684312fb3a210f0dc8e373
https://doi.org/10.1117/12.318029
https://doi.org/10.1117/12.318029
Publikováno v:
Fiber Optic Components and Optical Communication II.
With gain switched quantum well DFB laser generating pulse width 40ps, period 400ps, utilizing 3dB optical fiber directional coupler concatenated and precisely control optical path of each arm, we fabricate 8 X 2.5Gb/s pulse multiplexer. Experimental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42c052d927b330b5f6c9097e0c316df3
https://doi.org/10.1117/12.318030
https://doi.org/10.1117/12.318030