White light quantum dot fibre laser

Abstract

The invention relates to a white light quantum dot fibre laser which comprises a first fiber grating (1), a semiconductor blue light laser (2), a wavelength division multiplexer (3), quantum dot optical fibre (4), a second fibre grating (5) and a laser output end (6). The signal input end of the wavelength division multiplexer is connected with the first fibre grating (1), the pumping input end is connected with the semiconductor blue light laser, the pumping output end is connected with the quantum dot optical fibre which is connected with the reflection end of the second fibre grating (5), and the transmission end is the laser output end. Because exciting light of different sizes of quantum occurs in different degrees of red shift when a quantum dot is excited by the blue light, quantum dots of different sizes are mixedaccording to a certain proportion in glass optical fibre, therefore, the white light output can be realized. The invention has simple structure and easy fabrication, can realize the white light laser output, and can be widely applied to various fields of the optical fibre technology.

Description

technical field [0001] The invention relates to a white light quantum dot fiber laser, which belongs to the field of fiber lasers, in particular to the field of quantum dot fiber lasers. Background technique [0002] Lasers that emit white light generally have relatively complicated devices. White light lasers need to use neodymium-doped yttrium aluminum garnet lasers such as acousto-optic Q-switching to obtain 1064nm pulses, and then pump parametric oscillators to obtain lasers with a wavelength of 1535nm. 628nm laser output, 446nm laser is obtained by summing 628nm and 1535nm laser, 532nm laser is obtained by frequency doubling 1064nm, and finally white light output is synthesized. In addition, the microstructured fiber white light laser generator proposed by Wang Qingyue et al. requires a self-starting mode-locked laser, microstructured optical fiber, and multiple coupling lenses; the white light laser proposed by Zhu Shining et al. requires the use of optical superlattic...

AI Technical Summary

Problems solved by technology

In addition, the microstructured fiber white light laser generator proposed by Wang Qingyue et al. requires a self-starting mode-locked laser, microstructured optical fiber, and multiple coupling lenses; the white light laser proposed by Zhu Shining et al. requires the use of optical superlattices cascaded with different structures As a nonlinear crystal to produce quasi-white light output, the structure is complex and the ratio of red, green and blue light needs to be strictly adjusted to control the temperature

Images