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Alkali metal steam laser of polarized optical pumping

An alkali metal vapor pool and alkali metal technology, applied in lasers, laser components, phonon exciters, etc., can solve the problems of low efficiency, high cost, low laser output power, etc., and achieve high repetition rate and high power output , the effect of increasing the absorption efficiency

Inactive Publication Date: 2013-04-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the existing problems of high cost, low efficiency, and low laser output power in external cavity semiconductor lasers composed of volume Bragg gratings, the present invention provides a high-efficiency, high-power, polarized light-pumped alkali metal vapor laser

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  • Alkali metal steam laser of polarized optical pumping
  • Alkali metal steam laser of polarized optical pumping
  • Alkali metal steam laser of polarized optical pumping

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specific Embodiment approach 1

[0033] Specific implementation mode one, such as image 3 As shown, a polarized light-pumped alkali metal vapor laser of the present invention includes: an LD pumping unit for emitting and coupling pump light, a gain unit 14 for realizing laser amplification and a laser for realizing laser amplification. For an oscillating resonant cavity, the LD pump unit is placed outside the resonant cavity, and the gain unit 14 is placed inside the resonant cavity.

[0034] The LD pump unit in this embodiment is composed of an LD pump source 5 emitting pump light, a transmission fiber 6 transmitting the pump light, and a coupling lens group for coupling and focusing the pump light. The light is linearly polarized light in the p direction, and the polarization direction is orthogonal to the polarization direction of the oscillating light; the pump light is output to the coupling lens group through the transmission fiber 6, the core diameter of the transmission fiber 6 is 400 μm, and the num...

specific Embodiment approach 2

[0042] Specific implementation mode two, such as Figure 4 As shown, on the basis of the laser described in Embodiment 1, an acousto-optic Q switch 12 is inserted in the resonant cavity to achieve a high repetition rate output of laser light, and the acousto-optic Q switch 12 is placed between the gain unit 14 and the output mirror 11 , the acousto-optic Q switch 12 is placed in the plano-convex unstable cavity according to the Bragg diffraction conditions. The intracavity loss is serious, and laser oscillation cannot be formed; if the ultrasonic wave is suddenly removed, the intracavity loss suddenly drops, thereby forming a laser pulse. Driven by a high-frequency oscillation power supply, the above process is repeated to form a high repetition rate output of laser pulses.

[0043] The positions and functions of the LD pump unit, the gain unit 14 and the resonance cavity in this embodiment are the same as those described in the first embodiment.

[0044] In this embodiment, ...

specific Embodiment approach 3

[0048] Specific implementation mode three, such as Figure 5 As shown, on the basis of the laser described in Embodiment 1, in order to increase the output power of the laser, the method of double-terminal pumping of the LD double-alkali metal vapor cell is adopted, and the gain volume is increased and the pumping power of the LD injection is increased. Increase the output power of the alkali metal vapor laser.

[0049] In this embodiment, another gain unit 14 and a group of LD pumping units are placed between the gain unit 14 and the output mirror 11. The newly added group of LD pump units is placed close to the output mirror 11. The newly added gain unit 14 Unit 14 is placed close to another gain unit 14, and another polarizer 9 is also placed between the newly added group of LD pump units and a newly added gain unit 14, and the two-way pumps from two groups of LD pump units The pump light enters the adjacent alkali metal vapor pool 4 respectively, and pumps the alkali meta...

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Abstract

The invention relates to the technical field of novel lasers and discloses an alkali metal steam laser of polarized optical pumping. The alkali metal steam laser solves problems of high cost, low efficiency and low laser output power of existing semiconductor lasers and comprises an LD (laser diode) pumping unit, a gain unit and a resonance cavity, the LD pumping unit is placed outside the resonance cavity, the gain unit is placed in the resonance cavity, the LD pumping unit comprises an LD pumping source, a transmission optical fiber and a coupling lens group, a first magnetic pole and a second magnetic pole in the gain unit are arranged outside a constant-temperature furnace, an alkali metal steam pool is arranged inside the constant-temperature furnace, pumping light emitted by the LD pumping source is output to the coupling lens group by the transmission optical fiber, a coupling focusing piece enters the alkali metal steam pool through a polarized piece, effective particle number inversion of alkali metal atoms is realized under the action of pumping excitation, and alkali metal laser is formed under the feedback action of the resonance cavity and output by an output mirror. The alkali metal steam laser is low in cost, high in efficiency and high in laser output power.

Description

technical field [0001] The invention relates to the technical field of novel lasers, in particular to an alkali metal vapor laser pumped by polarized light. Background technique [0002] Laser light sources with high efficiency, high power, and high beam quality have broad application prospects in many fields such as industry, medical treatment, military affairs, and scientific research. The alkali metal vapor laser pumped by semiconductor laser takes into account the advantages of semiconductor lasers and gas lasers. It has high quantum efficiency, large laser stimulated emission cross section and small thermal effect, and has the ability to achieve high power, high efficiency and high beam quality near infrared The potential advantages of laser output have become one of the research hotspots in the laser field in recent years. [0003] Such as figure 1 Shown is a schematic diagram of the energy level transition of the alkali metal vapor laser, 2 S 1 / 2 is the ground sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/227H01S3/0941H01S3/08H01S3/117
Inventor 陈飞高飞李殿军谢冀江杨贵龙张来明郭劲
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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