Patent ID: 9647409
Date: 2017-05-09
CPC Classifications: G02F,H01S

Claim:
1. An ultra-wideband supercontinuum light source based on a dual-band fiber laser, wherein the ultra-wideband supercontinuum light source comprises: a first fiber laser, configured to generate a first-band laser beam, wherein the first-band laser beam is used to be evolved into a visible-to-near-infrared supercontinuum; a second fiber laser, configured to generate a second-band laser beam, wherein the second-band laser beam is used to be evolved into a near-infrared-to-mid-infrared supercontinuum; a wavelength division multiplexer, configured to combine the first-band laser beam and the second-band laser beam; a dual-band fiber amplifier configured to amplify the first-band laser beam and the second-band laser beam simultaneously; a silica PCF, one end of which is connected to an output end of the wavelength division multiplexer by using a fiber, and which is configured to output a laser beam after a first-stage non-linear effect is imposed on the combined laser beam, so that the first-band laser beam is evolved into a visible-to-near-infrared supercontinuum and that the second-band laser beam is evolved into an ultra-short pulse through modulation instability, wherein the wavelength division multiplexer is connected to the silica PCF by using the dual-band fiber amplifier, wherein the dual-band fiber amplifier comprises: a pump beam combiner, configured to combine multiple pump laser beams; an Er—Yb co-doped double-clad fiber, connected between an output end of the pump beam combiner and the silica PCF; and a pump source, configured to pump the Er—Yb co-doped double-clad fiber by using the pump beam combiner; and a non-silica glass fiber, one end of which is connected to an output end of the silica PCF by using a fiber, and which is configured to impose a second-stage non-linear effect on the laser beam after the first-stage non-linear effect is imposed, so that the ultra-short pulse with modulation instability is evolved into a near-infrared-to-mid-infrared supercontinuum, so that an ultra-wideband supercontinuum covering visible, near-infrared, and mid-infrared bands is output.