Communication waveband 1.5 micrometer laser wavelength standard generating method and device thereof

Abstract

The invention provides a communication waveband 1.5 micrometer laser wavelength standard generating method which comprises the steps of (1), making laser which is transmitted from a laser diode with a reflection reducing coating penetrate through an RF excited rubidium atom 5P-4D excitation state 1529nm optical filter, thereby performing selection on the frequency of the laser; (2), performing feedback of the laser after selection to the laser diode; and (3), outputting a laser wavelength standard which forms laser at a 5P-4D transition wavelength that corresponds with rubidium atom filtering. According to the method of the invention, the laser diode with the reflection reducing coating, the RF excited rubidium atom 5P-4D excitation state 1529nm optical filter and a laser chamber mirror are used for performing feedback, and a communication waveband 1.5 micrometer laser wavelength standard is realized. The communication waveband 1.5 micrometer laser wavelength standard has long-term stability and high accuracy and is a novel long-term stable 1.5 micrometer laser wavelength standard in the optical communication field.

Description

【Technical field】 [0001] The invention belongs to the field of space optical communication and laser technology, and specifically relates to a communication band 1.5 micron laser wavelength standard device, and related devices of the method 【Background technique】 [0002] When people talk about optical communication, they naturally think of lasers, optical fibers and high-speed data transmission, because they are the representatives of modern optical communication technology. However, optical communication in the modern sense originated from Einstein's concept of stimulated radiation and the formal appearance of lasers. Due to the rapid development of optical fiber communication in lasers and other fields in recent years, the laser wavelength standard in the communication band has a more solid foundation and clear application goals, and higher requirements are also put forward for its performance indicators. For the light source, in addition to requiring good output beam qu...

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Problems solved by technology

However, on the one hand, the signal amplitude of acetylene molecules is very small, and the frequency locking process is complicated; on the other hand, in the international conventional frequency stabilization system of rubidium atom excited state 1529nm (rubidium atom 1529nm, 5P-4D excited state) requires another An expensive set of frequency-stabilized pump lasers and complex servo loops are costly and bulky

In the prior art, there is no need to add an additional expensive frequency-stabilized pump laser, but to directly use radio frequency to excite the rubidium atom gas chamber to realize a communication band 1.5 micron laser wavelength standard system that is immune to temperature and current noise

On the other hand, because the radio frequency excited rubidium atomic gas cell will emit strong fluorescence lines, it is usually not suitable for use as a spatial light filter

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