Continuously tunable single-frequency Ti sapphire laser device

Abstract

The invention provides a continuously tunable single-frequency Ti sapphire laser device. The continuously tunable single-frequency Ti sapphire laser device comprises a pump source (3), a Ti sapphire crystal (2), a laser resonant cavity, an isolator, a double-refraction filter (4), an etalon (5) and piezoelectric ceramic (14), wherein a nonlinear crystal (1) is inserted between a third flat concave mirror (11) and a fourth flat concave mirror (12) forming the laser resonant cavity, the nonlinear crystal (1) is an optical crystal machined to be provided with two unparallel light through surfaces or an optical crystal placed in a light path at a Brewster angle; moreover, the nonlinear crystal (1) is used for realizing generation of second harmonics of the base-frequency light of the laser device in a mode of critical phase matching or noncritical phase matching. According to the continuously tunable single-frequency Ti sapphire laser device provided by the invention, the nonlinear loss stressed by the main oscillation mode of the base-frequency light is one half of a non-oscillation mode, thus the oscillation starting of the non-oscillation mode of the base-frequency light is effectively suppressed, and the laser device realizes continuously tunable property for the frequency in a valid gain bandwidth. The laser device is compact in structure and convenient to operate.

Description

technical field [0001] The invention relates to a titanium sapphire laser, in particular to a high-stability single-frequency titanium sapphire laser capable of continuous frequency tuning within a wide range. Background technique [0002] The output laser spectrum of the titanium-doped sapphire laser covers the red and near-infrared bands of 700-1000nm, and it is the solid-state laser with the widest tuning range so far. As a high-quality light source for atom cooling and atom trapping, continuous single-frequency tunable Ti:sapphire lasers are playing an increasingly important role in the fields of cold atom physics and quantum optics. Among them, the laser wavelengths of 780nm and 795nm correspond to the transition lines of rubidium atoms, which can be used to capture rubidium atoms and cool them; at the same time, using the laser with a wavelength of 780nm as pump light, the 1560nm entanglement source can also be obtained through OPO technology, which is located in the o...

AI Technical Summary

Problems solved by technology

The existence of the etalon locked loop not only increases the cost of the laser, but also makes it quite difficult to debug and use the laser

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