Fiber-optic amplifier with a device for monitoring the input...

Details Fiber-optic amplifier with a device for monitoring the input... Fiber-optic amplifier with a device for monitoring the input...

H - Electricity

01

S

H01S 3/091 (2006.01) H01S 3/094 (2006.01) H04B 10/08 (2006.01) H04B 10/17 (2006.01) H01S 3/00 (2006.01) H01S 3/102 (2006.01) H01S 3/131 (2006.01)

Patent

CA 2119838

Abstract of the Disclosure The input light in fiber-optic amplifiers is monitored in order to turn off the system in which it is contained, or individual components of the system, e.g. the fiber-optic amplifier itself, when input light is lacking. To that effect, in known fiber-optic amplifiers, a portion of the input light is coupled out by a coupler. However, this coupler has disadvantages; e.g. the signal-to-noise ratiodeteriorates. To monitor the input light, the fiber-optic amplifier of the present invention uses a device (4), which couples out and evaluates the pump light thatwas not absorbed by the section of the optical waveguide (2).

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