Hollow photonic crystal optical fiber gas absorption cell device and manufacturing method thereof

Abstract

The invention relates to a hollow photonic crystal optical fiber gas absorption cell device and a manufacturing method thereof. The device comprises a hollow photonic crystal optical fiber, a protective sleeve, a hermetic cabin, a vacuum gauge, a vacuum valve, window glass, a coupling mirror and a regulating component. According to the device disclosed by the invention, the characteristics that the hollow photonic crystal optical fiber is flexible and bendable and gas can be filled into a fiber core are utilized, quantitative injection of gas can be realized by using the hermetic cabin, the vacuum gauge and the vacuum valve, a light beam can enter the hollow photonic crystal optical fiber by being coupled by the coupling mirror and the window glass, and sealing is performed by an optical fiber metalization and feed-through welding process. The device disclosed by the invention has the characteristics of compact and small structure, high reliability, controllable gas pressure, repeated use and high coincidence degree of the section of the light beam and the gas section. The device disclosed by the invention can be used for gas spectroscopic analysis experiments and the gas absorption cell taking the frequency of a frequency stabilized laser as reference.

Description

technical field [0001] The invention relates to a hollow photonic crystal fiber gas absorption cell device and a manufacturing method thereof, which can be applied to the fields of gas absorption spectrum analysis, laser frequency stabilization, cold atomic clocks and the like. Background technique [0002] In the fields of gas absorption spectrum analysis, laser frequency stabilization, and cold atomic clocks, a laser with a specific frequency and high frequency stability is required. Using gas absorption lines as a frequency reference to stabilize frequency is a method to realize this laser. [0003] The gas absorption cell is one of the necessary components to use the gas absorption line as a frequency reference to achieve laser frequency stabilization. For some gases with relatively weak absorption intensity, a longer interaction distance between light and gas is required. In addition, especially for spaceborne, airborne, and vehicle-mounted applications, there are requ...

AI Technical Summary

Problems solved by technology

But this scheme has the following problems: once the gas absorption cell is made, the air pressure or gas type in the gas cell cannot be changed.

However, the airtightness and firmness of the epoxy resin sealing method are inferior to those of the metal welding method; in addition, the fiber diameter of the hollow-core photonic crystal fiber is different from that of the ordinary single-mode or multi-mode fiber, and the V-groove for fiber alignment is realized. Impossible to be realized by machining, it must be made by photolithography

Images