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Wavelength thermal tuning device of external cavity semiconductor laser and synchronous thermal tuning method

A semiconductor and laser technology, applied in the field of external cavity semiconductor lasers, can solve problems such as complex circuit control, achieve continuous tuning, simple structure, and simple tuning mechanism

Inactive Publication Date: 2015-10-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

If a large range of continuous tuning of the wavelength is required, complex circuit control is required

Method used

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  • Wavelength thermal tuning device of external cavity semiconductor laser and synchronous thermal tuning method
  • Wavelength thermal tuning device of external cavity semiconductor laser and synchronous thermal tuning method
  • Wavelength thermal tuning device of external cavity semiconductor laser and synchronous thermal tuning method

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0022] see first figure 1 , figure 1 It is the external cavity semiconductor laser device diagram of the present invention that adopts thermally-sensitized fiber Bragg grating. As can be seen from the figure, the wavelength thermal tuning device of the external cavity semiconductor laser of the present invention includes semiconductor gain chip 1. Enter Fiber Bragg Grating 2. The end surface of the gain chip 1 close to the grating is coated with an anti-reflection film to eliminate the resonant cavity effect of the gain chip itself. The other end is coated with a high reflection film, which is used to form a resonant cavity with the external cavity grating. Since the tapered lens 6 is directly ground and processed, it is integrated with the optical fiber and has a compact structure, w...

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Abstract

Provided are a wavelength thermal tuning device of an external cavity semiconductor laser and a synchronous thermal tuning method. The wavelength thermal tuning device comprises a semiconductor gain chip, a Bragg raster and a temperature controller. The Bragg raster is arranged along the laser output direction of the semiconductor gain chip. The semiconductor gain chip and the Bragg raster are arranged on the temperature controller. Through design of temperature sensitivity of an external cavity optical path, thermal drift of a laser cavity longitudinal mode is consistent with thermal drift of raster reflection spectra. When the temperature changes, synchronous drift of longitudinal mode distribution and raster reflection spectra is carried out, the laser keeps original working performances, and therefore wide-scope wavelength tuning is achieved. The wavelength tuning capability of a present narrow-linewidth external cavity semiconductor laser is raised.

Description

technical field [0001] The invention relates to an external cavity semiconductor laser, in particular to a wavelength thermal tuning device and a synchronous thermal tuning method of the external cavity semiconductor laser. Mainly used in optical communication, optical sensing and other fields. Background technique [0002] Due to its unique chip structure, semiconductor lasers have the advantages of direct photoelectric conversion, small size, long life, and high integration. They are widely used in optical communications, optical storage, and optical sensing. However, the linewidth of semiconductor lasers is usually relatively wide, for example, the linewidth of common DFB lasers is on the order of megahertz. It greatly limits its application in coherent optical communication, fiber optic sensing and other fields. [0003] One of the most mature methods to achieve narrow linewidth output is to use an external cavity laser, that is, to extend the resonant cavity of the la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/14H01S5/06
Inventor 张丽瞿荣辉魏芳陈迪俊杨飞蔡海文
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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