Single-doped Ho:YAG tunable single longitudinal mode laser on basis of torsional mode technology

Abstract

The invention discloses a single-doped Ho:YAG tunable single longitudinal mode laser on the basis of a torsional mode technology, relates to the technical field of a single longitudinal mode laser, and aims to improve high-efficiency, high-power and tunable continuous single longitudinal mode 2mum laser output. The single-doped Ho:YAG tunable single longitudinal mode laser on the basis of the torsional mode technology comprises a Tm:YLF laser, a pumping optical coupling system and a laser oscillator; the Tm:YLF laser emits Tm:YLF pumping light with a wavelength of 1,908nm; the pumping light enters the pumping optical coupling system; the pumping optical coupling system couples the pumping light and then the pumping light enters the laser oscillator; after forming laser oscillation, the laser oscillator outputs single longitudinal mode laser. The single-doped Ho:YAG tunable single longitudinal mode laser is suitable to generate the continuous single longitudinal mode 2mum laser output.

Description

technical field [0001] The invention relates to the field of single longitudinal mode lasers. Background technique [0002] Due to the characteristics of good coherence, narrow linewidth and stable frequency, single longitudinal mode lasers are widely used in optical frequency standards, fine spectrum measurement, coherent communication, laser radar and other fields. The 2μm band laser is in the weak absorption band of the human eye safety band and the atmosphere, so the 2μm band single longitudinal mode laser shows more and more extensive application prospects in military, medical, scientific research and many other fields. At present, the main technical solutions for obtaining single longitudinal mode laser output include: short cavity method, F-P etalon method, one-way ring cavity method, coupled cavity method, and torsional mode method. Among them, the torsional mode method can obtain higher single longitudinal mode laser power and at the same time cooperate with the F-...

AI Technical Summary

Problems solved by technology

Although the single-doped Tm laser has a compact structure, the emission cross-section of the single-doped Tm crystal is small and the thermal effect is serious, resulting in a small gain, low efficiency, and poor thermal stability of the single-doped Tm laser

Tm, Ho co-doped lasers have a population of particles on the energy level of the laser at room temperature, and the energy transfer between ions leads to a very large loss of Ho ion upconversion and reabsorption, resulting in the output power and efficiency of Tm, Ho co-doped lasers. severely restricted

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