Bad-cavity double-frequency Faraday laser
A laser and laser technology, applied in the laser field, can solve the problems of long-term laser frequency drift, easy mode hopping, and extremely high etching process requirements, so as to suppress the residual cavity traction effect, improve the frequency stability, and narrow the laser line width. Effect
Pending Publication Date: 2022-05-13
浙江法拉第激光科技有限公司
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Problems solved by technology
However, the above-mentioned grating has extremely high requirements on the etching process, and the interference filter has high requirements on the coating precision, so the production is difficult
More importantly, the transmittance of the frequency selection scheme using gratings and interference filters will be affected by mechanical vibration, ambient temperature and current changes, resulting in long-term drift of the laser frequency and easy mode hopping. and long-term application have brought many practical problems
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[0031] specific implementation plan
[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be further described in detail with reference to the accompanying drawings.
[0033] The schematic diagram of the structure of a dual-frequency Faraday laser with magneto-optical rotation bad cavity provided by the present invention is as follows: figure 1 shown.
[0034] The laser diode 1101 driven by the drive circuit 1102 is used as a light source to emit light. The light passes through the first Glan-Taylor prism 1201 and becomes linearly polarized light, and then enters the uniform magnetic field formed by the first ring magnet 1202 and the second ring magnet 1204 . The atomic gas cell 1203 is within the magnetic field. After the light enters the atomic gas cell 1203, it interacts with the atoms under the action of a uniform magnetic field. Due to the Zeema...
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The invention discloses a bad-cavity dual-frequency Faraday laser, which is characterized by comprising a laser diode system, a Faraday atom optical filter and a resonant cavity, wherein the laser diode system comprises a semiconductor laser diode and a driving circuit, and light generated by the laser diode system is output to the Faraday atom light filter; the light-emitting far end face of the semiconductor laser diode is plated with a high-reflection film to serve as a first cavity mirror of a resonant cavity, and the light-emitting end face of the semiconductor laser diode is plated with an antireflection film. The Faraday atom light filter is positioned in the resonant cavity, is used as an external cavity frequency selection device and is used for performing frequency selection on light generated by the semiconductor laser diode to obtain double-frequency Faraday laser and stabilizing the double-frequency Faraday laser in a transmission bandwidth of the Faraday atom light filter; the resonant cavity comprises a first cavity mirror and a second cavity mirror, and the reflectivity of the second cavity mirror is set to enable the cavity mode line width of the double-frequency Faraday laser to be larger than the transmission spectrum bandwidth of the Faraday atom light filter, so that the double-frequency Faraday laser works in a bad cavity area, and bad cavity double-frequency Faraday laser is obtained.
Description
technical field [0001] The invention belongs to the technical field of lasers, in particular to a bad-cavity dual-frequency Faraday laser. Background technique [0002] Ordinary external cavity semiconductor lasers have compact structure, high efficiency and strong reliability, and are widely used in precision measurement, cold atomic physics, quantum communication and other fields. Common semiconductor lasers generally use external cavity optical feedback to narrow the laser linewidth, and combine frequency selection devices in the external cavity to achieve frequency selection. At present, the most commonly used method in the world is the frequency selection method based on gratings and interference filters. Different frequency selection devices can be used to realize different types of lasers, such as distributed feedback (DFB, Distributed Feedback) and distributed Bragg reflection (DBR, Distributed Bragg Reflector) lasers etch gratings on semiconductor materials; Fiber ...
Claims
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IPC IPC(8): H01S5/06H01S5/0687H01S5/14
CPCH01S5/06H01S5/0607H01S5/0612H01S5/0687H01S5/14
Inventor 陈景标秦晓敏史田田张佳缪健翔
Owner 浙江法拉第激光科技有限公司