Cladding pumped optical fiber gain devices

Details Cladding pumped optical fiber gain devices Cladding pumped optical fiber gain devices

2005-11-29

2005-11-29

Kang, Juliana (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S027000, C385S031000, C385S033000

Reexamination Certificate

active

06970624

ABSTRACT:
The specification describes optical fiber gain devices, such as lasers and amplifiers, wherein losses due to a large step transition between an input section and a gain section are reduced by inserting an adiabatic transformer between the input section and the gain section. In the preferred case the adiabatic transformer comprises a GRadient INdex (GRIN) lens. The lens serves as an adiabatic beam expander (reducer) to controllably increase (reduce) the modefield of the beam as it travels through the step transition.

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Kishimoto et al, Coupling Characteristics Between Single-Mode Fiber and Square Law Medium, Jun. 1982, IEEE Transactions on Microwave Theory and Techniques, VOl. MTT-30, NO.6, pp. 882-893.

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