High power fiber amplifiers with passive pump module alignment
AssigneeKeopsys, Inc.
InventorsLew Goldberg, Marc Le Flohic
Life of this patent
Estimating the term…
Abstract
A hermetically sealed pump module for use with fiber devices is disclosed. The method and apparatus disclosed enable a pump module to be constructed that has a high coupling tolerance and which is inexpensive and easy to manufacture. The pump module may comprise a transparent window through which a pump beam is coupled from a laser diode into the inner cladding of a double cladding fiber. The transparent window also may serve as a substrate for the inner cladding of the double cladding fiber. The laser diode is sealed within the pump module housing with a lid and the window, which is bonded to the lid. The housing may contain a heat sink, heat-spreading sub-mount and a Peltier cooler.
Claims47
A hermetically sealed fiber pump module comprising:
- a housing, wherein the housing comprises a cavity;
- a laser diode, situated within the cavity, wherein the laser diode emits a pump beam;
- a lid, connected to the housing and situated above the laser diode, wherein the lid encloses the laser diode within the cavity through the lid while allowing the pump beam to exit the cavity;
- and
- a double cladding fiber, comprising a outer cladding and an inner cladding, wherein the double cladding fiber is connected to the lid and the outer cladding is stripped from the double cladding fiber in a stripped section and the pump beam is side-coupled into the stripped section of the double-cladding fiber.
A hermetically sealed fiber pump module comprising:
- a housing, wherein the housing comprises a cavity;
- a laser diode, situated within the cavity, wherein the laser diode emits a pump beam;
- a transparent window, situated above the laser diode, wherein the pump beam exits the cavity through the transparent window;
- and
- a double cladding fiber, comprising a outer cladding and an inner cladding, wherein the outer cladding is stripped from the double cladding fiber in a stripped section and the inner cladding in the stripped section is situated on the transparent window.
The optical fiber device of claim 33, wherein the optical fiber device is a fiber laser.
An optical fiber device comprising:
- a hermetically sealed pump module, comprising:
- a housing, wherein the housing comprises a cavity;
- a laser diode, situated within the cavity, wherein the laser diode emits a pump beam;
- and
- a transparent window, wherein the outer cladding is stripped from the double cladding fiber in a stripped section and the inner cladding in the stripped section is bonded to the transparent window situated above the laser diode and enclosing the laser diode in the cavity, wherein the pump beam exits the cavity through the transparent window;
- and
- a doped double cladding gain fiber, comprising an outer cladding and an inner cladding, wherein a portion of the gain fiber is contained within the pump module and is situated on the transparent window.
An optical fiber device comprising:
- a hermetically sealed pump module, comprising:
- a housing, wherein the housing comprises a cavity;
- a laser diode, situated within the cavity, wherein the laser diode emits a pump beam;
- and
- a transparent window, situated above the laser diode and enclosing the laser diode in the cavity, wherein the pump beam exits the cavity through the transparent window;
- and
- an undoped double cladding fiber, comprising an outer cladding and an inner cladding, wherein a portion of the inner cladding fiber is contained within the pump module and is situated on the transparent window.
A method of assembling a hermitically sealed pump module, comprising:
- preparing a fiber;
- assembling a pump module, wherein the pump module comprises a laser diode that emits a pump beam and a window through which the pump beam passes;
- aligning the fiber in pump module, wherein a portion of the fiber is attached to the window;
- fabricating the v-groove in the fiber, wherein the v-groove is aligned above the diode;
- and
- sealing the pump module, wherein the sealed pump module hermetically seals the laser diode within a housing.
Dependencies are inferred from the claim text.