Coherent light generators – Optical fiber laser
Patent
1994-05-13
1995-06-06
Bovernick, Rodney B.
Coherent light generators
Optical fiber laser
372102, H01S 307
Patent
active
054228972
ABSTRACT:
A high power monomode laser arrangement is able to manipulate the output from a high power laser diode array pump source 3 using a computer-generated hologram 4 to launch a high proportion of the pump source light into a multimode fiber portion including in input reflector 6. A monomode fiber portion 2 with the same fundamental-mode spot size as the multimode fiber portion 1 is optically coupled to the multimode fiber portion and includes a reflector 5 which reflects only the fundamental mode of the multimode and monomode fiber portions. The fundamental mode reflection forced by the monomode fiber portion 2 provides the feedback necessary to force predominantly fundamental mode oscillation which enables stimulated emission in only the fundamental mode.
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Eisenstein et al, "High-Power Extended-Cavity Laser at 1.3 .mu.m with a Single-Mode Fiber Output Port", Applied Physics Letter 50 (22), 1 Jun. 1987, pp. 1567-1568.
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Leger et al, "Geometrical Transformation of Linear Diode-Laser Arrays for Longitudinal Pumping of Solid-State Lasers", IEEE Journal of Quantum Electronics, Apr. 1992, 7 pages.
Armitage Jonathan R.
Wyatt Richard
Bovernick Rodney B.
British Telecommunications public limited company
Song Yisun
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