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Ajustable laser, optical module and passive optical network system

A laser and optical module technology, applied in the field of optical communication, can solve the problem of limiting the wavelength adjustment range of DFB thermally tunable lasers, and achieve the effect of large wavelength adjustment range

Inactive Publication Date: 2012-02-08
HUAWEI TECH CO LTD
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Problems solved by technology

However, the current DFB grating of DFB thermally tunable lasers usually uses indium gallium arsenide phosphide (InGaAsP) as the material, and its wavelength drift range is generally 0.1nm / K, that is, the temperature needs to be changed by 10 degrees to change the wavelength by 1 nanometer. Greatly limit the wavelength tuning range of the DFB thermally tunable laser

Method used

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  • Ajustable laser, optical module and passive optical network system
  • Ajustable laser, optical module and passive optical network system
  • Ajustable laser, optical module and passive optical network system

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Embodiment Construction

[0015] The tunable laser, the optical transceiver module, and the passive optical network system and equipment provided by the present application will be described in detail below in conjunction with specific embodiments.

[0016] In order to solve the problem that the wavelength adjustment range of the tunable laser is small, the application first provides a tunable laser with an FBG module, the FBG module includes a plurality of mutually spaced stop bands, and the tunable laser is adjusted by temperature so that One of the longitudinal modes of the emitted light of the gain medium moves to the stop band corresponding to the target wavelength of the FBG module to realize laser lasing with tunable wavelength. Through the vernier effect between the multiple longitudinal modes of light emitted by the gain medium and the multiple stop bands of the FBG module, the tunable laser provided by this application can achieve a large wavelength within a certain temperature adjustment rang...

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Abstract

The invention provides an adjustable laser, comprising a stop band filter module with a plurality of stop bands which are spaced; a gain medium connected to the stop band filter module, wherein emitted light of the gain medium has a plurality of longitudinal modules one of which is overlapped with the stop band of the stop band filter module; a wavelength adjusting module used for adjusting the longitudinal module position of the emitted light of the gain medium during wavelength adjustment of the adjuatable laser, such that the longitudinal modules shift to align with another stop band corresponding to a target wavelength in the stop band filter module. The invention also provides an optical module and a passive optical network system.

Description

technical field [0001] The present application mainly relates to optical communication technology, and in particular, relates to a wavelength-tunable laser (that is, a tunable laser) and an optical module, and the present application also relates to a passive optical network (Passive Optical Network) using the tunable laser. Network, PON) system. Background technique [0002] As users' demand for bandwidth continues to grow, traditional copper broadband access systems are increasingly facing bandwidth bottlenecks. At the same time, the optical fiber communication technology with huge bandwidth capacity is becoming more and more mature and the application cost is decreasing year by year. Optical fiber access network, such as Passive Optical Network (PON), has gradually become a strong competitor of the next generation broadband access network. At present, among many optical fiber access network solutions, the WDMPON system based on Wavelength Division Multiplexing (WDM) tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H04B10/24H04B10/14H04Q11/00
CPCH01S5/146H01S5/0654H01S5/06817H01S5/0687
Inventor 周小平王峰
Owner HUAWEI TECH CO LTD
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