Abstract: A method comprises: by a controller to communicate with devices of a network, storing classifiers assigned to groups of the devices to identify device commonality for each group; associating, to the classifiers, historical probabilities of success with which an automated response executed by one or more of the devices remediates a device alarm event; when a device of the devices reports the device alarm event, identifying each classifier to which the device belongs, each historical probability for each classifier, and a rule with classifier thresholds for the automated response; determining to execute the automated response on the device by evaluating the rule using each historical probability and the classifier thresholds; after the automated response is executed, performing a service test supported across the devices, and monitoring test results from the service test; and after the service test, updating each historical probability using the test results.

Abstract: A laser system includes a semiconductor laser having a laser driver coupled thereto. An output of the semiconductor laser is optically coupled to an input of an optical splitter that provides outputs including or coupled to a first branch having a first branch fiber coupled to a feedback reflector which provides a cavity boundary that defines a passive secondary cavity for the semiconductor laser, and a second branch including a back reflection reduction device. The roundtrip attenuation from an output facet of the laser to the feedback reflector is from ?30 dB to ?80 dB. The laser driver provides sufficient drive stability so that a frequency variation of the semiconductor laser is less than one free spectral range (FSR) of the secondary cavity. An output of said system is taken after the back reflection reduction device.