Fiber-optic amplifier with control of the pump light wavelength

Details Fiber-optic amplifier with control of the pump light wavelength Fiber-optic amplifier with control of the pump light wavelength

H - Electricity

01

S

H01S 3/13 (2006.01) H01S 3/131 (2006.01) H01S 3/096 (1990.01)

Patent

CA 2091822

Abstract FIBER-OPTIC AMPLIFIER WITH CONTROL OF THE PUMP LIGHT WAVELENGTH In fiber-optic amplifiers, for example those including a light waveguide piece (1) doped with Er3+, the wavelength of the pump light generated by the pump light source (2) must lie as precisely as possible at that wavelength that is desired as the pump light wavelength for the amplifying light waveguide piece (1). Deviations from this wavelength considerably adversely influence the performance of the optical amplifier. According to the invention, the fiber- optic amplifier includes a control device which regulates the wavelength of the pump light generated by the pump light source (2) to the absorption maximum lying at the desired wavelength. Preferably this is done in that part of the pump light is coupled into a reference light waveguide piece (10) which has its maximum absorption at the same wavelength as the amplifying light waveguide piece (1) and in that the absorption in the reference light waveguide piece (10) is used as a criterion for the regulation. -16- (Figure 2)

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