Optically stabilized feedback amplifier
AssigneeSiemens Aktiengesellschaft
InventorRobert Schimpe
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Abstract
An arrangement for operation as an optical feedback amplifier which is composed of a DFB laser whose grating selects a wavelength that differs by so much from the wavelength at which the amplification medium has a maximum gain that a constant amplification effect at this beamed-in wavelength is achieved by a progressive quenching of the emission of this wavelength selected by the grating given external optical irradiation via a coupled waveguide of light having a wavelength in the proximity of the wavelength of the gain maximum of the amplification medium.
Claims20
In an arrangement having a semiconductor laser that includes at least one optical amplification medium with maximum optical gain in laser operations at a mark wavelength .lambda..sub.M, a resonator, and means for forming a wavelength filter, said means for forming a wavelength filter selecting a wavelength .lambda..sub.L provided for the laser operation, the improvement comprising the means forming the wavelength filter being constructed so that the difference between the threshold gain of the resonator and the gain of the amplification medium during the laser operation is lower at the selected wavelength .lambda..sub.L than at the marked wavelength .lambda..sub.M and that the arrangement further includes an apparatus for the optical irradiation of the amplifying medium with at least one wavelength.
In an arrangement according to claim which includes an apparatus for outfeed of the radiation from the semiconductor laser.
Dependencies are inferred from the claim text.