Frequency stabilization and light intensity stabilization dual-piezoelectric ceramic tuning external cavity semiconductor laser

A piezoelectric ceramic and dual piezoelectric technology, applied in the field of lasers, can solve the problems of output light direction change, difficulty in realizing mode-hop-free broadband tuning, etc., and achieve the effect of compact structure

Pending Publication Date: 2020-10-16
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the grating feedback external cavity semiconductor laser configured by Littrow inevitably changes the length of the external cavity during the adjustment of the grating angle. It is susceptible to direction changes due to the rotation of the grating; there is no grating-feedback external cavity laser that can have two operating modes: broadband non-mode-hopping tuning, frequency stabilization and light intensity stabilization, in order to cope with the research and development stage of the atomic sensor laboratory. The need for frequency stabilization

Method used

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  • Frequency stabilization and light intensity stabilization dual-piezoelectric ceramic tuning external cavity semiconductor laser
  • Frequency stabilization and light intensity stabilization dual-piezoelectric ceramic tuning external cavity semiconductor laser
  • Frequency stabilization and light intensity stabilization dual-piezoelectric ceramic tuning external cavity semiconductor laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1, such as figure 1 , 4 As shown, a frequency-stabilized and light-intensity dual piezoelectric ceramic tuned external cavity semiconductor laser, including:

[0058] Bottom plate 25; a cavity is provided at the center of the bottom plate 25;

[0059] blaze grating 1;

[0060] A two-dimensional adjustment module; the blazed grating 1 is fixed on the two-dimensional adjustment module, and the two-dimensional adjustment module is used to adjust the position of the blazed grating 1 in the horizontal direction;

[0061] output mirror 15;

[0062] The flexible adjustment platform 13; the two-dimensional adjustment module and the output mirror 15 are placed on the flexible adjustment platform 13; the flexible adjustment platform 13 is placed in the cavity of the bottom plate 25, and the flexible adjustment platform 13 is connected to the bottom plate 25 through a flexible connection mechanism 31;

[0063] Piezoelectric ceramic a2;

[0064] The piezoelectric ceram...

Embodiment 2

[0078] Example 2, such as figure 1 As shown, on the basis of Embodiment 1, the laser diode module includes:

[0079] laser diode 20;

[0080] Laser tube mount 21; the laser mount 21 is fixed above the bottom plate 25, and the laser diode 20 is fixed in the through hole in the laser mount 21;

[0081] A temperature compensation element 19; the laser diode 20 realizes constant temperature control through the temperature compensation element 19; the temperature compensation element 19 is installed on the surface of the laser mount 21;

[0082] Heat sink 22 ; the heat sink 22 is mounted on the temperature compensation element 19 .

[0083] In this embodiment, the laser mount 21 is fixed above the bottom plate 25 through a small contact surface to reduce heat conduction with the bottom plate 25 . The laser diode 20 realizes constant temperature control through the temperature compensation element 19 . The temperature compensating element 19 is located on the surface of the lase...

Embodiment 3

[0085] Example 3, such as figure 1 As shown, on the basis of Embodiment 1, the light intensity stabilization module includes a 1 / 2 wave plate III 23 , a polarization beam splitter PBS III 24 , and a photodetector 15 .

[0086] In this embodiment, the laser beam enters the light intensity stabilization module after passing through the collimator 18 . When in the mode of stable frequency and stable light intensity, the controller can fine-tune the current of the laser drive circuit according to the change of light intensity, so as to stabilize the light intensity. By adjusting the rotation angle of the 1 / 2 wave plate III23, the polarization plane of the laser beam can be rotated, and then the beam splitting ratio of the transmitted light and reflected light can be adjusted through the polarization beam splitter PBSIII24.

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Abstract

The invention discloses a frequency stabilization and light intensity stabilization dual-piezoelectric ceramic tuning external cavity semiconductor laser. The laser comprises a laser diode module, a collimator, a light intensity stabilizing module, a blazed grating, an output reflector, an output polarization light splitting module, a two-dimensional adjusting module, a flexible adjusting platform, piezoelectric ceramic a, piezoelectric ceramic b, a frequency stabilizing module, a bottom plate, an elastic damper and a shell. The double piezoelectric ceramics are adopted to drive the flexible adjusting platform to achieve blazed grating rotation and translation, the length of the outer cavity can be adjusted when the angle of the grating is adjusted, a fixed longitudinal mode is kept in theouter cavity, and therefore broadband mode-hopping-free tuning is achieved. When atomic absorption spectrum characteristic analysis needs to be carried out, a frequency tuning mode can be adopted, and when a stable laser beam is needed, a light intensity stabilizing mode and a frequency stabilizing mode can be adopted; the output reflector and the blazed grating are placed on the flexible adjusting platform together, and the output light beam does not deflect in the tuning process.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a frequency-stabilized and light-intensity dual piezoelectric ceramic tuned external cavity semiconductor laser. Background technique [0002] Due to their small size and narrow line width, semiconductor laser diodes are widely used in atomic sensors such as small atomic clocks, atomic magnetometers, and atomic gyroscopes. In the experimental stage of the development of the above-mentioned atomic sensor, precise experimental measurement and analysis of the atomic absorption spectrum is required; when the atomic sensor is working, it is also necessary to precisely lock the frequency and light intensity of the laser. Although existing commercial laser diodes have a very narrow linewidth, the frequency is easily affected by temperature, current, etc. and drifts, and the light intensity will also change slowly with the aging of the device and other factors. Therefore, in the research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/022H01S5/065H01S5/068H01S5/00
CPCH01S5/005H01S5/0085H01S5/0657H01S5/068
Inventor 舒强吉方汪宝旭朱明智邓东阁杨飞
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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