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Grating external cavity semiconductor laser and quasi-synchronous tuning method

A technology of semiconductors and lasers, applied in the field of conductor lasers, can solve problems such as the complexity of mechanical systems, unfavorable laser structure design, adjustment and application, and increased instability factors, so as to achieve large room and space, easy adjustment, and simple adjustment Effect

Inactive Publication Date: 2012-10-03
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This limitation makes the structural design, adjustment and application of the laser very unfavorable in many cases, and at the same time causes the complexity of the mechanical system and increases the instability factor

Method used

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  • Grating external cavity semiconductor laser and quasi-synchronous tuning method
  • Grating external cavity semiconductor laser and quasi-synchronous tuning method
  • Grating external cavity semiconductor laser and quasi-synchronous tuning method

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Embodiment Construction

[0051] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated.

[0052] The invention proposes to adopt quasi-synchronous tuning method to realize continuous tuning of laser frequency, which includes conventional synchronous tuning conditions. The quasi-synchronously tuned grazing incidence (Littman) structure grating feedback external cavity semiconductor laser structure of an embodiment of the present invention is as follows image 3 As shown, it includes: semiconductor laser tube (LD) 1, aspheric collimator lens (AL) 3, grating (GT) 12 and feedback mirror (M) 5.

[0053] image 3 Among them, N represents the normal line of the grating; θi represents the incident angle of the light beam emitted by the semiconductor laser tube 1 and collimated by the collimator lens 3 on the grating; θd represents the diffraction angle of the light beam on the grating. G deno...

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Abstract

The invention discloses a grating external cavity semiconductor laser and a quasi-synchronous tuning method. When the laser output frequency tuning is carried out by rotating a reflector (5), the position (uq, vq) of a tuning rotation center of the reflector (5) meets an equation: (uq-u0) cos (theta d)+vq=0, wherein the theta d is a diffraction angle of a light beam on a grating; uq is a distancebetween the tuning rotation center and the plane of the reflection surface of the reflector (5); vq is a distance between the tuning rotation center and the plane of the diffraction surface of a grating (12); and the u0 is a distance between the conventional synchronous frequency tuning rotation center of the reflector (5) and the plane of the reflection surface of the reflector (5). The laser and the method are easy to design and realize laser synchronous rotation frequency or wavelength tuning.

Description

technical field [0001] The invention relates to the technology of the conductor laser, in particular to a grating external cavity semiconductor laser in a grazing incidence (Littman) structure and a grazing diffraction structure and a quasi-synchronous tuning method. Background technique [0002] The existing conventional synchronously tuned grazing incidence structure (Littman structure) external cavity semiconductor laser structure such as figure 1 As shown, it includes: a semiconductor laser tube (LD) 1, an aspheric collimator lens (AL) 3, a grating (GT) 12, and a feedback mirror (M) 5. [0003] figure 1 Among them, N represents the normal line of the grating; θi represents the incident angle of the light beam emitted by the semiconductor laser tube 1 and collimated by the collimator lens 3 on the grating; θd represents the diffraction angle of the light beam on the grating. G denotes the intersection of the centerline of the beam with the diffractive surface of the gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/14H01S5/06
Inventor 臧二军曹建平李烨方占军
Owner NAT INST OF METROLOGY CHINA
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