Abstract: It is disclosed a method for driving a laser diode such as to enable mitigation or elimination of so called spiking effects related to the number of injected carriers in the laser overshooting the equilibrium value at the beginning of the lasing process. In this manner, among other things, the efficiency of a master oscillator power amplifier that may be utilized in range finding applications will be improved. It is further disclosed an optical pulse transmitter comprising such a laser diode.

Abstract: It is disclosed a method for driving a laser diode such as to enable mitigation or elimination of so called spiking effects related to the number of injected carriers in the laser overshooting the equilibrium value at the beginning of the lasing process. In this manner, among other things, the efficiency of a master oscillator power amplifier that may be utilized in range finding applications will be improved. It is further disclosed an optical pulse transmitter comprising such a laser diode.

Abstract: It is disclosed a method for driving a laser diode such as to enable mitigation or elimination of so called spiking effects related to the number of injected carriers in the laser overshooting the equilibrium value at the beginning of the lasing process. In this manner, among other things, the efficiency of a master oscillator power amplifier that may be utilized in range finding applications will be improved. It is further disclosed an optical pulse transmitter comprising such a laser diode.

Abstract: It is disclosed a method for driving a laser diode such as to enable mitigation or elimination of so called spiking effects related to the number of injected carriers in the laser overshooting the equilibrium value at the beginning of the lasing process. In this manner, among other things, the efficiency of a master oscillator power amplifier that may be utilized in range finding applications will be improved. It is further disclosed an optical pulse transmitter comprising such a laser diode.

Abstract: For setting the optical gain of an optical amplifier such as a Raman amplifier that is connected in a wavelength division multiplexing (WDM) system, the gain of the amplifier is made dependent on the states of optical polarizers connected to individual inputs of a WDM multiplexer. The polarizers can be actively controlled by a device connected to sense the output power of the Raman fiber at different wavelengths. For an appropriate control the optical gain can be given any desired shape such as for example a reasonable flatness. The control of the polarization states of the WDM-channels allows for the use of a single wavelength pump source of the amplifier, instead of the conventionally used multiwavelength source.

Abstract: For setting the optical gain of an optical amplifier such as a Raman amplifier that is connected in a wavelength division multiplexing (WDM) system, the gain of the amplifier is made dependent on the states of optical polarizers connected to individual inputs of a WDM multiplexer. The polarizers can be actively controlled by a device connected to sense the output power of the Raman fiber at different wavelengths. For an appropriate control the optical gain can be given any desired shape such as for example a reasonable flatness. The control of the polarization states of the WDM-channels allows for the use of a single wavelength pump source of the amplifier, instead of the conventionally used multiwavelength source.

Abstract: The present invention is an arrangement for utilizing optical information sent through an optical network from a sending site to at least one receiving site. An optical parametric amplifier OPA receives the optical information sent at a set of input wavelengths. A mixer amplifier mixes the input wavelengths with an optical pump wavelength. A set of optical conjugate copy wavelengths are generated from the set of input wavelengths. A WDM-splitter separates the set of input wavelengths from the set of conjugate copy wavelengths. The set of input wavelengths and/or the set of conjugate copy wavelengths are forwarded individually to the at least one of the receiving site.

Abstract: The present invention is an arrangement for utilizing optical information sent through an optical network from a sending site A to a at least one receiving site B1, B2, B3. The arrangement comprises an optical parametric amplifier OPA for receiving the optical information sent at a set of input wavelengths &lgr;1÷&lgr;n. The arrangement also comprises a mixer in the amplifier OPA for mixing the input wavelengths &lgr;1÷&lgr;n, with an optical pump wavelength &lgr;p and means for generating a set of optical conjugate copy wavelengths {tilde over (&lgr;)}1÷{tilde over (&lgr;)}n extracted from the set of input wavelengths &lgr;1÷&lgr;n. A WDM-splitter is used for separating the set of input wavelengths &lgr;1÷&lgr;n from the set of conjugate copy wavelengths {tilde over (&lgr;)}1÷{tilde over (&lgr;)}n.