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High-power 671 nm laser obtaining method

An acquisition method and high-power technology, applied in the field of laser applications, can solve problems such as high technical difficulty, and achieve the effects of strong operability, good single-mode performance, and high power

Inactive Publication Date: 2015-04-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of expensive and technically difficult ways to obtain 220mW lithium atom cooling laser, and propose a method for obtaining high-power 671nm laser

Method used

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Embodiment Construction

[0027] The invention proposes a high-power laser diode with a wavelength of 658nm at normal temperature injected into a low-power seed laser to obtain a 220mW 670.98nm single-mode laser.

[0028] The specific operation process is as follows:

[0029] Around 658nm, there are cheap laser tubes up to 300mW. In this embodiment, ML101F27 and LPC826 produced by Mitsubishi Corporation are selected, and the price of both is about 45 yuan.

[0030] Select ML101F27 and LPC826 laser tubes with long wavelengths at room temperature, and the wavelengths of the emitted lasers at 22°C are 658.6nm and 657.6nm respectively. The main laser is a 670nm external cavity laser produced by TOPTICA, with a maximum output power of 2mW. Through the adjustment of the current, temperature and the length of the external cavity, the main laser is adjusted to a single-module 670.98nm output with a power of 1.4mW. Since the power of the main laser is only 1 / 200 of the power of the slave laser, which is far ...

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Abstract

The invention relates to a high-power 671 nm laser obtaining method, and belongs to the technical field of laser application. The method comprises the following steps: carrying injection locking on seed laser with weak power into a high-power laser diode with a normal temperature wavelength of 658 nm, and using a threshold value adjusting method to find the optimal injection points, so as to achieve the purpose of obtaining 220 mW single mode laser with the wavelength of 670.98 nm. The high-power 671 nm laser obtaining method disclosed by the invention is high in operability; the obtained lithium atom cooled laser is good in single mode performance and high in power.

Description

technical field [0001] The invention relates to proposing a high-power 671nm laser acquisition method, which belongs to the technical field of laser applications. Background technique [0002] In recent years, how to obtain high-power lithium D-line resonance laser has attracted much attention in the cold atom experiment of lithium and the study of quantum degenerate gases. The wavelength of the laser in air is 670.98nm, which requires good single-mode performance. The current acquisition scheme is either expensive or has low output power. [0003] Currently limited by the influence of semiconductor doping materials and processes, the optical power of semiconductor lasers with a wavelength of 671nm is not high, only within 50mW, and external cavity frequency-stabilized lasers made with such laser tubes can often only work below 10mW , far below the power required by cold atom experiments. [0004] Since the Bose Einstein condensate of lithium was realized at Rice Universit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/0941H01S3/098H01S3/081H01S3/10
Inventor 曹强潘昌基
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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