公开(公告)号：US20230411933A1

公开(公告)日：2023-12-21

申请号：US18329448

申请日：2023-06-05

Applicant: Lumentum Operations LLC

Inventor： John G. BAI ,  Victor ROSSIN

IPC: H01S5/40 ,  H01S5/20 ,  H01S5/02253 ,  H01S5/024

CPC classification number: H01S5/4012 ,  H01S5/2036 ,  H01S5/4025 ,  H01S5/02253 ,  H01S5/02469

Abstract: An optical module includes a stepped structure that includes a plurality of steps, a plurality of laser diodes (e.g., broad area laser diodes (BALs)), a transform lens; a grating; and an output coupler (OC). At least one laser diode, of the plurality of laser diodes, is disposed on each step of the plurality of steps of the stepped structure. The transform lens is configured to receive a plurality of laser beams emitted by the plurality of laser diodes and to direct the plurality of laser beams to the grating. The grating is configured to receive and to combine the plurality of laser beams into a single laser beam, and to direct the single laser beam to the OC. The OC is configured to receive the single laser beam from the grating and to direct a portion of the of the single laser beam out of the optical module.

公开(公告)号：US20230178966A1

公开(公告)日：2023-06-08

申请号：US18062915

申请日：2022-12-07

Applicant: Lumentum Operations LLC

Inventor： Cailin WEI ,  John G. BAI ,  Jihua DU ,  Prasad YALAMANCHILI ,  Victor ROSSIN

IPC: H01S5/40 ,  G02B27/28 ,  G02B27/09 ,  H01S5/02251 ,  H01S5/02325 ,  H01S5/02315

CPC classification number: H01S5/4012 ,  H01S5/4025 ,  G02B27/285 ,  G02B27/0905 ,  G02B27/0922 ,  G02B27/0944 ,  G02B27/0955 ,  G02B27/0977 ,  H01S5/02251 ,  H01S5/02325 ,  H01S5/02315 ,  G02B27/286

Abstract: A laser module includes a laser submodule, a polarization beam combiner (PBC), a beam rotator, a grating, and an output fiber (e.g., each disposed on an internal surface of a floor of the laser module). The laser submodule is configured to emit an array pattern of beams, which the PBC is configured to combine into a vertical stack pattern of beams, which the beam rotator is configured to rotate into a horizontal stack pattern of beams, which the grating is configured to combine into an overlapped pattern of beams, which the output fiber is configured to emit. The vertical stack pattern of beams, the horizontal stack pattern of beams, and the overlapped pattern of beams are to transmit through the laser module parallel to a single common plane (e.g., that is parallel to the internal surface of the floor of the laser module).

公开(公告)号：US20240097406A1

公开(公告)日：2024-03-21

申请号：US18066728

申请日：2022-12-15

Applicant: Lumentum Operations LLC

Inventor： Martin H. MUENDEL ,  Matthew Glenn PETERS ,  James J. MOREHEAD ,  John G. BAI ,  Victor ROSSIN

IPC: H01S5/40 ,  H01S5/02255 ,  H01S5/028 ,  H01S5/10

CPC classification number: H01S5/4087 ,  H01S5/02255 ,  H01S5/028 ,  H01S5/1082

Abstract: In some implementations, a laser diode array may comprise a cavity that includes a rear facet and a front facet and multiple emitters that are transversely single mode and disposed within the cavity. In some implementations, the multiple emitters each include a seeding section having a constant emitter width that is single mode at the rear facet and a flared section having a monotonically expanding emitter width that increases adiabatically over a majority of a length of the cavity such that outputs from the multiple emitters are single mode at the front facet. In some implementations, the emitter width is less than twenty micrometers at the front facet.

公开(公告)号：US20220344910A1

公开(公告)日：2022-10-27

申请号：US17305484

申请日：2021-07-08

Applicant: Lumentum Operations LLC

Inventor： Martin H. MUENDEL ,  Victor ROSSIN ,  James J. MOREHEAD ,  John G. BAI

IPC: H01S5/50 ,  H01S5/40 ,  H01S5/12

Abstract: In some implementations, an optical device (e.g., a monolithic master oscillator power amplifier (MOPA) diode) may include a first facet, one or more gratings, an amplifier structure terminated with a second facet, and an oscillator array that includes multiple singlemode oscillators coupled to the first facet and to the one or more gratings. In some implementations, the multiple singlemode oscillators may be configured to generate multiple seed beams and to transmit the multiple seed beams into the amplifier structure through the one or more gratings.

公开(公告)号：US20240413607A1

公开(公告)日：2024-12-12

申请号：US18671459

申请日：2024-05-22

Applicant: Lumentum Operations LLC

Inventor： Li FAN ,  Victor ROSSIN

IPC: H01S5/10 ,  H01S5/20 ,  H01S5/24

Abstract: A semiconductor laser may include an off-cut substrate having a cut angle of at least approximately 6 degrees (°). The semiconductor laser may include an epitaxial structure over the off-cut substrate. A first sidewall formed by the off-cut substrate and the epitaxial structure may be parallel to a second sidewall formed by the off-cut substrate and the epitaxial structure. A front facet formed by the off-cut substrate and the epitaxial structure may be parallel to a back facet formed by the off-cut substrate and the epitaxial structure. The cut angle of the off-cut substrate may cause the first sidewall to be non-perpendicular to epitaxial layers of the epitaxial structure. The cut angle of the off-cut substrate may cause the second sidewall to be non-perpendicular to the epitaxial layers of the epitaxial structure.

公开(公告)号：US20240106200A1

公开(公告)日：2024-03-28

申请号：US18060203

申请日：2022-11-30

Applicant: Lumentum Operations LLC

Inventor： Li FAN ,  Victor ROSSIN

IPC: H01S5/20 ,  H01S5/22

CPC classification number: H01S5/2036 ,  H01S5/22

Abstract: An optical device includes a substrate and an epitaxial layer structure disposed over the substrate. The epitaxial layer structure includes a first clad layer disposed over the substrate, a first waveguide layer disposed over the first clad layer, an active layer disposed over the first waveguide layer, a second waveguide layer disposed over the active layer, a second clad layer disposed over the second waveguide layer, and a cap layer disposed over the second clad layer. The optical device further includes a pair of trenches formed in an inner region of a surface of the epitaxial layer structure, and a pair of grooves, each formed in an outer region of the surface of the epitaxial layer structure. Each trench does not extend into the active layer, and each groove extends into the active layer. A light-current curve associated with the laser optical device is kink-free and/or smooth.