Optical waveguides – With optical coupler – Particular coupling function
Patent
1991-11-07
1993-02-16
Ullah, Akm E.
Optical waveguides
With optical coupler
Particular coupling function
372 6, G01S 330, H01S 330, G02B 622
Patent
active
051877597
ABSTRACT:
Indiscriminately exciting the modes of a multi-mode optical fiber amplifier is avoided by an optical fiber amplifier design in which the excitation of pump modes in the core of a multi-mode fiber is controlled by controlling the pump light launching. The pump light is directed substantially along the center axis of a multi-mode fiber within a predetermined launch angle. Rather than exciting all modes, only lower order modes are affected.
REFERENCES:
patent: 4815079 (1989-03-01), Snitzer et al.
patent: 4955025 (1990-09-01), Mears et al.
patent: 5096277 (1992-03-01), Kleinerman
DiGiovanni David J.
Giles Clinton R.
Kramer Stuart A.
Nykolak Gerald
Presby Herman M.
AT&T Bell Laboratories
Graves Charles E.
Ullah Akm E.
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