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Work station regulation means of direct regulating outside cavity laser and adjusting apparatus

A technology for adjusting devices and adjusting methods, which is applied to devices for controlling output parameters of lasers, lasers, semiconductor lasers, etc., can solve problems such as the inability to ensure direct adjustment of external cavity lasers, and achieve the effect of ensuring transmission performance and avoiding deviations

Inactive Publication Date: 2008-03-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a working point adjustment method and adjustment device of a directly tuned external cavity laser, to solve the problem that when the existing DFB laser working point adjustment method is directly used for a directly tuned external cavity laser, the direct tuned external cavity laser cannot be guaranteed. When the wavelength of the output light is the nominal wavelength, the die temperature is also at the correct temperature point, which can ensure that the directly regulated external cavity laser works at the correct die temperature, and effectively play the advantages of the directly regulated external cavity laser

Method used

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  • Work station regulation means of direct regulating outside cavity laser and adjusting apparatus
  • Work station regulation means of direct regulating outside cavity laser and adjusting apparatus
  • Work station regulation means of direct regulating outside cavity laser and adjusting apparatus

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Embodiment 1

[0042] Please refer to FIG. 6, which is a hardware structure block diagram of Embodiment 1 of the working point adjustment device of the direct-adjusted external cavity laser of the present invention. As shown in the figure: it mainly includes direct-tuning external cavity laser, automatic temperature control loop, automatic power control loop and extinction ratio control circuit. among them:

[0043] The direct-tuning external cavity laser includes a thermistor, TEC (thermoelectric cooler) and backlight detection part in addition to the laser.

[0044] The automatic temperature control circuit: consists of the thermistor resistance value detection circuit, TEC current drive circuit, laser die temperature control circuit (including potentiometer RP1), etc., and forms negative feedback with the thermistor and TEC inside the laser Loop.

[0045] The automatic power control circuit is composed of a laser output optical power detection circuit, a bias current control circuit (includin...

Embodiment 2

[0055] Please refer to FIG. 7 again, which is a hardware structural block diagram of Embodiment 2 of the operating point adjustment device of the direct-adjusted external cavity laser of the present invention. As shown in the figure: it mainly includes direct-tuning external cavity laser, automatic temperature control loop, automatic power control loop and extinction ratio control circuit. among them:

[0056] The direct-tuning external cavity laser includes the thermistor, TEC (thermoelectric cooler) and backlight detection part in addition to the laser.

[0057] Automatic temperature control circuit: It is composed of thermistor resistance detection circuit, TEC current drive circuit, laser die temperature control circuit (including potentiometer RA3), etc., and forms a negative feedback loop with the thermistor and TEC inside the laser road.

[0058] Automatic power control circuit: It is composed of laser output optical power detection circuit, bias current control circuit (in...

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Abstract

A workpoint adjusting method of straightening exocoel laser is provided, the processes are that: firstly, the output light efficiency of the straightening exocoel laser is nominal output efficiency; secondly, the temperature of a tube core is adjusted to make the output light wavelength reach the nominal wavelength; thirdly, the corresponding adjustment quantity value of the tube core when reaching the nominal wavelength in the previous step; fourthly, testing process; fifthly, if the temperature of middle tube core is correct, when reducing the temperature of the tube core in single direction continuously, the changes of the wavelength is linetype, if the temperature of the tube core is correct, otherwise, incorrect; sixthly, if the temperature of the tube core is correct, the recording value is recovered; if incorrect, returning to the second process; seventhly, the extinction ratio of the laser is adjusted. An adjusting device which is composed of a straightening exocoel laser, a laser drive circuit, an automatic control circuit and an automatic efficiency control circuit is provided. Aiming to the characteristic relation between the temperature of the tube core and the wavelength of the straightening exocoel laser, the adjusting processes are provided, therefore ensuring the transmission performance and the adaptation on light transmission system.

Description

Technical field [0001] The invention relates to a direct adjustment external cavity laser for important components in an optical transmission system, in particular to a method and an adjustment device for adjusting the working point of the direct adjustment external cavity laser. Background technique [0002] Lasers are important components in optical transmission systems. DFB (Distributed Feed Back) lasers are mostly used in high-speed optical transmission systems for long-distance transmission. The specific structure of this laser is the wavelength selection part (Bragg grating). Integrated in the active area. However, with the advancement of laser technology, the direct-tuning external cavity laser whose wavelength selection part is located in the passive area outside the laser material has also begun to be successfully commercialized in the field of optical communications. A typical example is the 2.5Gb / s long-distance direct-current laser produced by K2. Adjust the external ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/00H01S5/14H01S5/06H04B10/00
Inventor 华锋张赟
Owner ZTE CORP
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