Patent ID: 9588399
Date: 2017-03-07
CPC Classifications: G02B,G02F,H01S

Claim:
1. An all-fiber laser frequency mixer, comprising the following parts coupled in sequence: a laser frequency mixer input fiber, configured to input fundamental frequency light used for frequency-mixing; a first coreless silica fiber, configured to perform beam expanding transmission on the fundamental frequency light that is input by the laser frequency mixer input fiber; a first graded index (GRIN) fiber, configured to perform collimation and focusing on the fundamental frequency light that is input after the beam expanding transmission by the first coreless silica fiber; a second coreless silica fiber, configured to perform focusing transmission on the fundamental frequency light after the collimation and focusing by the first Grin fiber; a frequency-mixing crystal, configured to perform nonlinear frequency conversion on the fundamental frequency light that is input after the focusing transmission by the second coreless silica fiber, and generate a frequency-mixing laser; a third coreless silica fiber, configured to perform beam expanding transmission on the frequency-mixing laser generated by the frequency-mixing crystal; a second Grin fiber, configured to perform collimation and focusing on the frequency-mixing laser that is input after the beam expanding transmission by the third coreless silica fiber; a fourth coreless silica fiber, configured to perform focusing transmission on the frequency-mixing laser after the collimation and focusing by the second Grin fiber; a laser frequency mixer output fiber, configured to transmit the frequency-mixing laser that is input after the focusing transmission by the fourth coreless silica fiber; and a fiber end cap, configured to prevent system damage caused by end face reflection.