Low-threshold Tm:ZBLAN glass continuous and Q-modulating mode-locked all solid state laser

Abstract

The invention belongs to the field of laser technology, and discloses a low-threshold Tm:ZBLAN glass continuous and Q-modulating mode-locked all solid state laser. The laser comprises the components of a pumping source which is used for generating pumping laser with wavelength of 793nm; a focusing lens which is used for realizing high permeability to the pumping laser and focusing the pumping laser to crystal; a Tm:ZBLAN glass laser gain medium which is used for changing the wavelength of laser and changing the pumping laser with central wavelength of 793nm to the laser in the 2[mu]m waveband;a low-threshold resonator which is used for realizing operation of low-threshold laser; and a transmissive semiconductor saturable absorption lens (SESAM) which is used for converting output continuous light to pulse light. According to the low-threshold Tm:ZBLAN glass continuous and Q-modulating mode-locked all solid state laser, continous light outlet threshold is reduced to 35nW; the stable Q-modulating mode-locked threshold power is reduced to 973mW; the Q-modulating envelope pulse width is 6[mu]s; the repetition frequency is 25kHz; the pulse repletion frequency in Q-modulating envelope is 106.4MHz; the pulse width is about 800ps; and highest monopulse energy is 1.09nJ.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a low-threshold Tm:ZBLAN glass continuous and Q-switched mode-locked all-solid-state laser. Background technique [0002] Glass laser crystals have a disordered atomic arrangement, and the non-uniform broadening effect of the spectrum makes the emission spectrum linewidth reach 30-40nm, which can support laser output below 100 femtoseconds, easy to achieve large-scale growth, low production cost, and support low threshold Power running. Tm: ZBLAN, heavy metal fluorozirconate glass disordered crystal matrix material, composed of ZrF 4 -BaF 2 -LaF 3 -A1F 3 -NaF, has excellent light transmission characteristics in the wavelength range of 230nm-8000nm, the phonon energy is very low, much lower than many other crystals, the non-radiative transition probability of rare earth ions in it is small, and many of them cannot be used in oxides and crystals The observed transitions can be ...

AI Technical Summary

Problems solved by technology

However, the hardness of glass crystals is usually not high enough, and their thermal conductivity is poor compared to other materials, which limits the application of glass laser crystals in the research of ultrafast all-solid-state lasers.

[0003] The problems existing in the prior art are: the hardness of glass crystals is usually not high enough, and the thermal conductivity is relatively poor compared to other materials, which limits the application of glass laser crystals in the research of ultrafast all-solid-state lasers

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