Seed-injected 2μm-band single-frequency pulse optical parametric oscillator based on heterodyne beat frequency locking

Abstract

The invention discloses an injection-seeding 2 mum band single frequency pulse optical parametric oscillator based on heterodyne beat locking, which comprises five parts of an injection-seeding optical path, a pumping optical path, an integrated resonator, a beat frequency test module and an electrical control module. The injection-seeding 2 mum band single frequency pulse optical parametric oscillator based on heterodyne beat locking has the advantages that the frequency stability is high; the line width is controllable; the repetition frequency and the pulse width are adjustable; the anti-interference ability is strong; the service life is long; the structure is compact; and both engineering commercialization and airborne and spaceborne requirements can be met.

Description

technical field [0001] The invention relates to a single-frequency pulse laser, in particular to a seed-injected single-frequency pulse all-solid-state optical parametric oscillator based on heterodyne beat frequency locking. Background technique [0002] The 2μm band laser is in the eye-safe band and the absorption peak of water molecules, which is easily absorbed by biological tissues and can also be used as the pumping source of the optical parametric oscillator in the mid-infrared band; at the same time, it is located in the atmospheric transmission window and has strong penetrating ability to the atmosphere and smoke , covering the absorption spectrum of many greenhouse gases and polluting gases, has shown great application value and broad market prospects in the fields of laser medical treatment, coherent communication, laser ranging, laser radar, photoelectric countermeasures, atmospheric environment monitoring, etc., so the invention of reliable 2μm The single-band s...

AI Technical Summary

Problems solved by technology

However, the 2μm band is located near the degeneracy point, the parametric gain bandwidth is large, and the output laser linewidth is difficult to narrow. The resonant detection lock cavity technology uses piezoelectric ceramic cavity scanning to obtain single-frequency output, and piezoelectric hysteresis and mechanical ringing are inevitable. , reduce system feedback accuracy, poor laser frequency stability and anti-interference ability

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