Abstract: A method and system for controlling an optical amplifier in an optical waveguide system to reduce the effects of noise, particularly due to amplified spontaneous emission. The method comprises determining the gain between an input and an output of the optical amplifier; determining a customized pulse train in accordance with the determined gain and a desired gain; and controlling a pump source of the optical amplifier in accordance with the customized pulse train. Determining the customized pulse train includes determining a desired pulse width as a function of the determined gain, the desired gain and the pulse width at the determined gain. Similarly, a desired pulse spacing is determined as a function of the determined gain, the desired gain and the pulse spacing at the determined gain. Controlling the pump source preferably includes driving the pump source in accordance with the customized pulse train.

Abstract: A method and system for the automated collection and storage of calibration data over the entire spectral and power range of an optical functional system having an optical functional device and a device controller. The automatic calibration test set-up of the invention includes a laser source, an optical power controlling device, and an optical multimeter that are stepped over the entire operating range of the optical functional device. Measurements are taken at the input and output to the device, and at the input and output to the device controller. The test set-up is coupled to a calibration workstation which, in turn, can be coupled to the controller of the optical system. Since the controller is based on a digital microprocessor, it is straightforward to programme the controller to store data or to execute particular algorithms as required by a given operational configuration.

Abstract: A method to prevent overspeed of an internal combustion and attached ancillary devices in a mechanized vehicle includes one or more procedures to prevent improper gear selection to disengage the lockup function of a torque converter, to initiate engine braking and to destroke variable displacement hydraulic pumps. Requested gear selection in downshift is allowed only after interrogation of brake pressure, ground speed, shift selection requested and torque converter output speed. The torque converter lock-up solenoid is activated or deactivated in response to torque converter output speed which is compared to selected values to engage or disengage. Engine braking using a compression release braking system response to engine RPM in manual or automatic mode to prevent overspeed. Variable displacement pumps are destroked in response to engine RPM by adjusting swashplate control. The systems may be operated independently or under the control of a common electronic module.

Abstract: A method to prevent overspeed of an internal combustion and attached ancillary devices in a mechanized vehicle includes one or more procedures to prevent improper gear selection to disengage the lockup function of a torque converter, to initiate engine braking and to destroke variable displacement hydraulic pumps. Requested gear selection in downshift is allowed only after interrogation of brake pressure, ground speed, shift selection requested and torque converter output speed. The torque converter lock-up solenoid is activated or deactivated in response to torque converter output speed which is compared to selected values to engage or disengage. Engine braking using a compression release braking system response to engine RPM in manual or automatic mode to prevent overspeed. Variable displacement pumps are destroked in response to engine RPM by adjusting swashplate control.