MULTI-MODE FIBER AMPLIFIER

摘要

A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber. The probability of damage of the absorber may be minimized by the insertion of an additional semiconductor optical power limiter into the cavity.

主权项

1. An optical apparatus comprising:
a length of multi-mode optical fiber comprising a gain medium and configured to propagate a fundamental mode; a length of single mode optical fiber configured to propagate a single mode; and a splice between the length of multi-mode optical fiber and the length of single-mode optical fiber, wherein the single mode of the length of single mode optical fiber is matched to the fundamental mode of the length of multi-mode optical fiber.