公开(公告)号：US20220283540A1

公开(公告)日：2022-09-08

申请号：US17689645

申请日：2022-03-08

Applicant: TERAXION INC.

Inventor： François TREPANIER ,  Sylvain BOUDREAU ,  Alain MAILLOUX ,  Guillaume BROCHU

IPC: G03H1/04 ,  G03H1/02 ,  G02B5/32

Abstract: A method of manufacturing a Volume Bragg Grating (VBG) is provided, comprising providing a cylindrical bulk medium made of a transparent glass material and having a central axis along a longitudinal direction, and inscribing an interference pattern in the cylindrical bulk medium. The interference pattern has a plurality of grating fringe elements distributed along a line parallel to the central axis. The method further includes rotating the cylindrical bulk medium about the central axis during said inscribing, thereby azimuthally extending the grating fringes elements. There is further provided a VBG manufactured according to such a method, the use of such a VBG in a CPA system of cladding-pumped fiber laser.

公开(公告)号：US20220120964A1

公开(公告)日：2022-04-21

申请号：US17502997

申请日：2021-10-15

Applicant: TERAXION INC. ,  UNIVERSITÉ LAVAL

Inventor： Samuel GOUIN ,  Claude CARIGNAN ,  Mathieu FAUCHER ,  François TREPANIER ,  Guy ROUSSEAU ,  Martin BERNIER ,  Alain VILLENEUVE

IPC: G02B6/02 ,  C03C25/622

Abstract: A method and a system for providing a low absorption Bragg grating along a grating region of an optical fiber are presented. The Bragg grating is written along the grating region by multiphoton absorption of ultrafast light pulses impinged on this grating region through a polymer coating of the optical fiber. The Bragg grating is then photobleached by propagating a photobleaching light beam along the optical fiber. The photobleaching light beam has optical parameters selected to reduce defects in the grating region induced by the writing of the Bragg grating in a substantially non-thermal regime.