公开(公告)号：US20240413609A1

公开(公告)日：2024-12-12

申请号：US18697112

申请日：2022-09-28

Applicant: University of Southampton

Inventor： Peter George Robin SMITH ,  Rex Hugh Seton BANNERMAN ,  Devin Hugh SMITH

IPC: H01S5/14 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/102 ,  H01S3/137 ,  H01S3/30

Abstract: An optical source comprises: a pump source operable to generate laser light at a first wavelength; a single mode optical fibre arranged to receive laser light at the first wavelength from the pump source, the optical fibre being fabricated from material having a Raman gain profile for stimulated Raman scattering of light at the first wavelength, and a Brillouin gain profile for stimulated Brillouin scattering of light at the second wavelength to a third wavelength longer than the second wavelength; and a superstructured fibre Bragg grating formed in the optical fibre, the grating comprising: a periodic refractive index profile along a core of the optical fibre, giving transmission of the first wavelength to allow received laser light at the first wavelength to enter the superstructured fibre Bragg grating, reflection of the second wavelength at a first level, and reflection of the third wavelength at a second level lower than the first level; and a phase shift at an intermediate location along a length of the grating; wherein the series of pulses at the third wavelength comprise a pulsed output of the optical source.