Optical fiber coupler amplifier

Details Optical fiber coupler amplifier Optical fiber coupler amplifier

1991-05-02

1992-06-02

Healy, Brian

Optical: systems and elements

Optical amplifier

Optical fiber

359345, 372 6, 372 70, 385 27, 385 31, 385 42, 385141, H01S 330, H01S 3091, G02B 626

Patent

active

051192306

ABSTRACT:
Conventional optical amplifiers for the amplification of optical signals propagating in an optical waveguide use a first light source for the production of pump light, by means of which an active laser substance is excited to a first energy level above its upper laser level. According to the invention, a second light source is used to excite the active laser substance to a second energy level that is above the first energy level. By doing so, spontaneous emission between the laser levels of the active laser substance is suppressed in favor of induced emission.

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"Low-Noise Erbium-Doped Fibre Amplifier Operating at 1.54 um", R. J. Mears, L. Reekie, I. M. Jauncey and D. N. Payne, Electronics Letters, vol. 23, No. 19, Sep. 10, 1987, pp. 1026-1028.

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