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Illuminating source self-adapting mode alignment device and method

一种对准装置、自适应的技术，应用在光通信领域，能够解决增加器件成本以及维护成本、F-PLD波长控制方法不再可行、影响系统可靠运行等问题，达到成本便宜、降低注入光功率阈值、降低功率要求的效果

Inactive Publication Date: 2007-02-07
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual work, if you do not do specific wavelength calibration for each F-P LD, then the range of mode mismatch is larger, and the resulting differences between ONUs will affect the reliable operation of the system
However, wavelength calibration for each F-P LD will greatly increase device cost and maintenance cost
If the AWG is not a heat-free AWG with high cost, then the drift of the AWG channel will make the usual F-P LD wavelength control method no longer feasible

Method used

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  • Illuminating source self-adapting mode alignment device and method
  • Illuminating source self-adapting mode alignment device and method
  • Illuminating source self-adapting mode alignment device and method

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Embodiment Construction

[0064] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] Pattern lock method:

[0066] When the wavelength of the injected light remains constant, the output optical power varies with temperature as figure 2 , when the temperature gradually increases, the longitudinal mode moves to the long-wavelength direction, and the output optical power also changes with the profile of the longitudinal mode. We introduce a small periodic change to the temperature of the laser. If the injected light is not aligned with the center of the longitudinal mode, the small temperature modulation will cause a large power fluctuation because the edge of the longitudinal mode is very steep. We can judge the temperature adjustment direction according to the phase relationship between the power fluctuation and the temperature modulation signal. If the injected light is aligned figure 2 , then the change of optical power is in phase with ...

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Abstract

The invention relates to a light source self-adaptive mode aiming device, which comprises connected laser and temperature controller, signal processor, wherein said laser converts incident light into current signal; said current signal via span resistance is amplified into voltage signal; the modulate signal generated by signal processor adjusts the deflected voltage of temperature controller; the deflected voltage and the modulate signal are transformed into control voltage in the signal processor, to be sent to the temperature controller. The invention also provides a relative method. The invention can realize the automatic aim between wave length and longitudinal mode of laser, with low cost, to reduce the effect of compensated temperature change.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a light source adaptive mode alignment device and alignment method. Background technique [0002] At present, the rapid development of video services makes users' demand for bandwidth higher and higher. The 2M bandwidth of DSL can cope with the current data transmission business, but it is difficult to meet the video business. New broadband access networks such as EPON and GPON have further improved the bandwidth of the access network, but due to the use of time division multiplexing and burst mode technologies, the cost of the system remains high, and all users share the bandwidth, and the bandwidth of a single user It doesn't add much. The development of video services, especially the demand for high-definition video services, prompts people to develop access networks with larger bandwidths. The WDM-PON network based on wavelength division multiplexing inherits the bandw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04B10/572
CPCH04B10/572H04J14/0226H04J14/0282H04J14/02H04J14/0246G02F2201/58H04J14/025
Inventor 张徐亮赵峻江涛黄伟林华枫王运涛卫国陈郡王峰
Owner HUAWEI TECH CO LTD
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