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High average power full optical fiber intermediate infrared supercontinuum light source

An average power, all-fiber technology, applied in the field of laser optoelectronics, can solve the problems of limiting supercontinuum conversion efficiency, average power and spectral broadening range, etc., to achieve the effects of improved broadening, enhanced nonlinear effects, and broad application prospects.

Inactive Publication Date: 2014-05-28
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This technical solution can generate a supercontinuum with an average power of tens of watts and a wavelength of more than 4 microns, but the properties of the last fiber limit the further improvement of the conversion efficiency, average power and spectral broadening range of the supercontinuum

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  • High average power full optical fiber intermediate infrared supercontinuum light source
  • High average power full optical fiber intermediate infrared supercontinuum light source

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention is not limited to the following embodiments.

[0020] Please see first figure 1 , figure 1 It is a structural schematic diagram of the high average power mid-infrared supercontinuum light source of the present invention. In this embodiment, the pulse pumping source 1 is an erbium-ytterbium co-doped fiber laser outputting 1.55 micron and nanosecond pulse laser, and a section of single-mode passive fiber 2 is Corning SMF-28e fiber with a length of 10 meters. The output laser of the pulsed pump source 1 passes through a passive optical fiber 2, and then the spectrum is broadened to 1.5 microns to 2.2 microns, and the pulses of each wavelength component in the time domain are split from 1.55 micron nanosecond pulses to picosecond and femtosecond pulses. Then it passes through a thulium-doped fiber amplifie...

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Abstract

The invention discloses a high average power full optical fiber intermediate infrared supercontinuum light source. The light source comprises a pulse pumping source with an output pigtail, a single mode passive optical fiber, at least one level of thulium doped optical fiber amplifier, a second optical fiber combiner and an er-doped fluoride optical fiber, wherein the pulse pumping source with the output pigtail, the single mode passive optical fiber, at least one level of thulium doped optical fiber amplifier, the second optical fiber combiner and the er-doped fluoride optical fiber are successively connected along a light path. A second pumping source and the second input end of the second optical fiber combiner are connected. According to the invention, a high power laser diode is used to carry out pumping on the er-doped fluoride optical fiber, thus a spectrum is broadened in the optical fiber due to a nonlinear effect and is strengthened due to high gain produced by pumping near 2.7 microns; the nonlinear effect in an intermediate infrared wave band is further stimulated, thus a eventually acquired supercontinuum has a wide wavelength coverage area and high average power; due to the adoption of a full optical fiber structure, integration and commercialization can be easily carried out; and the light source has a wide application prospect in frequency measurement, wavelength division multiplexing and other fields.

Description

technical field [0001] The invention relates to the technical field of laser optoelectronics, in particular to a high-average-power all-fiber mid-infrared supercontinuum light source. Background technique [0002] Supercontinuum has become a research hotspot in recent years due to its application prospects in frequency measurement, wavelength division multiplexing and optical coherence tomography. Among all kinds of supercontinuum generating devices, the fiber supercontinuum light source is particularly attractive, mainly because the supercontinuum light source with an all-fiber structure is less affected by the external environment and is easy to integrate, which is convenient for commercialization. equipment. [0003] At present, the existing optical fiber supercontinuum light sources are mainly divided into two categories: one extends from ultraviolet to near-infrared, and the other extends from near-infrared to mid-infrared. The former mainly uses specially designed qu...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/23
Inventor 徐剑秋杨建龙唐玉龙王尧李宏强罗永锋王世伟杨帅颜硕
Owner SHANGHAI JIAO TONG UNIV
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