A standard temperature control device

Abstract

The invention relates to etalon temperature controlling apparatus for lasers, comprising a heat sink (1), a controlling element (2), a controlled unit (3), a sensor (4) and a temperature controlling circuit (5). The controlled unit (3) is made from heat conducting materials, an etalon (10) and the sensor (4) are equipped therein; the controlling element (2) is a semiconductor cooling chip provided with a light-passing hole in the center, the heat-absorbing surface of the semiconductor cooling chip has close contact with one surface of the controlled unit (3), and the heat-radiating surface of the semiconductor cooling chip has close contact with one surface of the heat sink; both the heat sink (1) and the controlled unit (3) are provided with light-passing holes in the center, which are coincident with the hole in the controlling element (2). The etalon temperature controlling apparatus has the advantages of impact structure, wide control scope, high precision in temperature controlling, easy realization in rapid temperature control, and reliable operation in a long time.

Description

technical field [0001] The invention relates to a laser, in particular to an etalon temperature control device for the laser. Background technique [0002] The single-frequency laser obtained by laser diode (LD)-pumped neodymium-doped matrix laser through intracavity frequency doubling has been widely used in many fields, especially in recent years, quantum information, quantum network and related research fields have become the pumping source. The quality and power of single-frequency green lasers put forward higher and higher requirements. In high-power lasers, ring cavity mode selection is generally used to achieve single-frequency output. However, in high-power intracavity frequency-multiplied lasers, stable single longitudinal mode oscillation cannot be obtained only by ring cavity mode selection. [0003] In order to obtain a mode-stabilized single longitudinal mode laser, we need to insert an optical filter in the laser cavity to narrow the stimulated emission bandwi...

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Problems solved by technology

Such as resistance heater can only heat, can not cool, and can only reduce furnace body temperature by the natural heat dissipation of furnace to the outside when temperature is too high, so it is not suitable for quick control, and can not control the temperature of etalon 10 below zero; In addition, Both the control element and the sensor are placed on the periphery of the cylindrical tube, away from the central area of ​​the etalon, so the temperature cannot be precisely controlled, and the etalon will be damaged due to uneven heating on the surface of the etalon; the large volume of this device is not easy to put into the laser Resonator used in

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