Temperature-controllable optical fiber input and output optical filtering system

Abstract

The invention relates to a temperature-controllable optical fiber input and output optical filtering system, and belongs to the technical field of astronomical spectrums. A two-stage temperature controller of the system is connected with an isolation cavity through an outer-layer control wire, and the two-stage temperature controller is connected with an optical filtering system through an inner-layer control wire; an input light source is led in through an input optical fiber, an output light source is led out through an output optical fiber, and the input optical fiber and the output optical fiber penetrate through the isolation cavity to be connected into the optical fiber input end and the optical fiber output end of the optical filtering system respectively. According to the temperature-controllable optical fiber input and output optical filtering system provided by the invention, an inner-layer temperature control loop and an outer-layer temperature control loop are adopted, so that the influence and impact of an environment temperature wave band on the inner-layer temperature control loop are reduced, and the temperature stability and the control precision (the temperature fluctuation is less than 10mK) of an internal optical filtering device under a long-term working condition can be remarkably improved.

Description

technical field [0001] The invention relates to a temperature-controllable optical fiber input and output optical filter system, which belongs to the technical field of astronomical spectroscopy. Background technique [0002] Contemporary optical astronomical spectroscopic observations place high demands on the accuracy and stability of related terminal instruments. For example, fiber-optic input high-resolution spectrometers and calibration units for high-precision radial velocity measurement require high-stable environmental control measures for their optical systems to achieve long-term low-drift work. Among them, the temperature control of a single optical component needs to meet the requirements of high precision and high stability at the same time. For this reason, it is usually necessary to reduce the thermal sensitivity of the system as much as possible by selecting appropriate materials and temperature compensation structures in the design of the instrument syste...

AI Technical Summary

Problems solved by technology

However, for astronomical applications, long-term mechanical and optical stability and control accuracy are more important than the ability to adapt to severe environmental temperature changes, which cannot be satisfied by such technical solutions

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