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All optical fibre adjustable width continuous spectrum laser pump source for superflat wide-band Raman amplification

A Raman amplification and all-fiber technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of greatly increased engineering costs, and achieve the effect of simplifying the structure and saving costs

Inactive Publication Date: 2004-02-25
TSINGHUA UNIV
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Problems solved by technology

These two Raman pump sources will greatly increase the cost of system engineering, and require enhanced safety protection against strong lasers during system installation, commissioning and operation

Method used

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  • All optical fibre adjustable width continuous spectrum laser pump source for superflat wide-band Raman amplification
  • All optical fibre adjustable width continuous spectrum laser pump source for superflat wide-band Raman amplification
  • All optical fibre adjustable width continuous spectrum laser pump source for superflat wide-band Raman amplification

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Embodiment Construction

[0058] The FBCSL uses a highly optical nonlinear fiber (HNL-DSF) with nearly flat zero-dispersion characteristics at the Raman laser wavelength as the gain medium, and can connect broadband optical reflectors at both ends of the HNL-DSF fiber to form a linear Fabry-Perot (F-P) resonant cavity, and the HNL-DSF fiber can also be connected into a ring resonant cavity by using a wavelength division multiplexing broadband coupler.

[0059] image 3It is the optical path structure of the F-P cavity FBCSL. The F31 end of HNL-DSF is connected to the 312 end of WDM31 (Wideband Wavelength Division Multiplexing Fiber Coupler), the 313 end of WDM31 is connected to the pump source, and the pump light is fed into HNL-DSF through the coupling between 313-312 ends of WDM31 Stimulated Raman scattering in the fiber is excited to form a gain region. The F32 end of HNL-DSF is connected with the 321 end of 3dBDC32 (optical fiber coupler with coupling ratio of 50%), and the 323 end and 324 end of...

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Abstract

The present invention relates to an all-optical-fibre adjustable bandwidth continuous spectrum laser pump source (FBCSL) for ultraflat wideband Raman amplification, belonging to the field of high-speed wideband optical fibre communication technology. It adopts a high optical non-linear optical fibre (HNL-DSF) with approaching flat zero dispersion characteristics at Raman laser wavelength place as gain medium, and on the two ends of the above-mentioned HNL-DSF) a wideband reflector can be connected to form all the optical fibre Fabry-Perot (F-P) adjustable bandwidth continuous spectrum Raman laser or a wideband wavelength division multiplexing optical fibre coupler is connected to form all-optical-fibre circular cavity adjustable bandwidth continuous spectrum Raman laser.

Description

technical field [0001] The invention belongs to the technical field of optical fiber amplifiers and lasers and high-speed broadband optical fiber communication, and particularly relates to a method for realizing ultra-flat broadband balanced optical fiber Raman amplification in a dense wavelength division multiplexing (DWDM) optical communication system and an adjustable width of all optical fibers Continuous Spectrum Laser Pumping Source (FBCSL). Background technique [0002] The advent of erbium-doped fiber amplifier (EDFA) (1986) has triggered a major leap in the development of optical fiber communication technology. The wavelength division multiplexing (WDM) transmission technology using EDFA has become the leading direction of the development of optical fiber communication engineering systems today. With the rapid growth of various communication services such as data, voice, image, and multimedia in recent years, the transmission capacity of WDM optical communication sy...

Claims

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Application Information

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IPC IPC(8): H01S3/091H04B10/2537H04J14/02
Inventor 张巍王燕彭江得刘小明
Owner TSINGHUA UNIV
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