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External cavity laser and WDM-PON (Wavelength Division Multiplex-Passive Optical Network) system

A laser, laser technology, applied in optical multiplexing systems, lasers, selection devices for multiplexing systems, etc., can solve problems such as unstable output optical power, and achieve the effect of solving unstable output optical power

Active Publication Date: 2011-07-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide an external cavity laser and a WDM-PON system to solve the problem of unstable output optical power of existing lasers due to polarization dependence

Method used

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  • External cavity laser and WDM-PON (Wavelength Division Multiplex-Passive Optical Network) system
  • External cavity laser and WDM-PON (Wavelength Division Multiplex-Passive Optical Network) system
  • External cavity laser and WDM-PON (Wavelength Division Multiplex-Passive Optical Network) system

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] Embodiments of the present invention firstly provide an external cavity laser, such as figure 2 As shown, it includes a gain medium 1, a filter 2, a Faraday rotating mirror (FRM) 3 and optical fibers connecting the above devices. Wherein, the Faraday rotating reflector 3 can be a 45-degree rotating emitting mirror, which is coupled to the optical fiber between the filter 2 and the output end (not marked) of the outer wall laser, and at least A portion of t...

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Abstract

The embodiment of the invention discloses an external cavity laser, relating to the technical field of WDM-PON (Wavelength Division Multiplex-Passive Optical Network) and effectively solving the problem, i.e. the output optical power of the external cavity laser is instable, caused by polarization dependence. The external cavity laser comprises a gain medium, a filter and a Faraday rotary reflector which form an oscillation cavity, and light emitted by the gain medium repeatedly oscillates in the oscillation cavity.

Description

technical field [0001] The present invention relates to the technical field of optical fiber access, in particular to an external cavity laser and a Wave Division Multiplexing-Passive Optical Network (WDM-PON) system. Background technique [0002] At present, among many optical fiber access network solutions, WDM-PON technology has attracted much attention due to its advantages such as large bandwidth capacity and similar point-to-point communication mode to ensure information security. However, the cost of WDM-PON is relatively high, and the laser is the factor that has the greatest impact on the cost in WDM-PON. [0003] In the WDM-PON system, in order to solve the problem of high cost, it is necessary to find a low-cost laser solution. Such as figure 1 As shown, it is a schematic structural diagram of a WDM-PON using a self-seeded colorless external cavity laser in the prior art. [0004] Taking the channel with a wavelength of λ1 as an example, the optical signal sent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/14H01S5/068H04Q11/00
CPCH01S5/0656H01S5/146H01S5/5036H04B10/27H04B10/503H01S5/141H04J14/0282H04B10/2587H01S5/4012H01S5/4087H01S2301/14H01Q11/00H01S5/14
Inventor 林华枫徐之光彭桂开
Owner HUAWEI TECH CO LTD
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