A coherent fiber array laser power projection system scalable to large number of subapertures and includes sensors that produce signals dependent upon beam characteristics, and controllers configured to control beam characteristics to achieve either phasing of outgoing beams at transmitter plane or coherent beam combining at a remote target or both.

A light source, including: a pulse generator for providing an initial sequence of light pulses, the pulse generator including an optical source for producing optical pulses; and a modulator in communication with the optical source for increasing or decreasing the selected number of pulses provided by the pulse generator in the selected time period; first and second optical arms, for propagating, respectively, first and second sequences of light pulses, wherein the first optical arm includes a first manipulator configured to generate the first sequence of light pulses from the initial sequence of light pulses, wherein the light source includes a nonlinear optical element arranged to receive the first sequence of light pulses or the second sequence of light pulses, and an optical switch arranged to switch either the first sequence of light pulses or the second sequence of light pulses for reception by the nonlinear optical element.

A fixed input current is provided to a pump laser of an optical pumping block. Further, a first tuning temperature is provided to the pump laser while providing the fixed input current. The first tuning temperature is based on a target band of a pumping beam and causes the pump laser to generate a light beam having a first frequency band that is dictated by the first tuning temperature and the fixed input current. Further, a second tuning temperature is provided to a temperature dependent optical reflector configured to receive the light beam. The second tuning temperature is based on the target band of the pumping beam and causes the optical reflector to reflect light of the light beam that is within a second frequency band that corresponds to the target frequency band. The reflected light beam is emitted into a transmission optical medium configured to carry an optical signal.

The present invention makes it possible to improve excitation efficiency in a fiber laser device provided with a TFB having an injection optical fiber not connected to an excitation light source. This fiber laser device is provided with: a plurality of excitation light sources, at least one fiber bundle that injects excitation light from the plurality of excitation light sources from a plurality of injection optical fibers and couples the excitation light to one optical fiber; and a cavity that introduces the excitation light coupled by the fiber bundle and amplifies and emits laser light. The number of the plurality of injection optical fibers of the fiber bundle is larger than the number of the plurality of excitation light sources, and a loop part is configured by connecting surplus injection optical fibers to which the excitation light is not injected among the plurality of injection optical fibers of the fiber bundle.

An optical amplifier may include an optical fiber to propagate a forward optical signal in a path of propagation of the optical amplifier. The optical fiber may have an input end face that is angled non-perpendicular to the path of propagation. The optical amplifier may include an optical component, in optical communication with the input end face of the optical fiber, to direct a backward optical emission away from the path of propagation.

A photonic device is configured with a photonic integrated circuit (PIC), a plurality of fiber-based gain mediums in optical communication with the PIC, and at least one optical pump outputting pump light coupled into two or more gain mediums. At least one of the fiber-based gain media and the PIC form a hybrid resonant optical cavity there between operative to lase light into the PIC. The gain media further include one or more fiber amplifiers amplifying light signals coupled into and decoupled from the PIC. The photonic device is integrated with Si photonic passive and active photonic elements, while ail fiber links between the gain media and PIC are free from these elements.

A laser system includes a signal source configured to generate input pulses, a diffraction grating module configured to stretch and split the input pulses into a plurality of spectral channels, a set of phase control devices, each phase control device being configured for spectral phase control of a respective spectral channel of the plurality of spectral channels, a power amplifier array of amplifier modules, each amplifier module of the power amplifier array being configured to amplify a respective spectral channel of the plurality of spectral channels, a spectral combiner configured to spectrally combine the plurality of spectral channels via diffraction grating-based pulse compression, and a feedback controller coupled to the spectral combiner to provide feedback to the set of phase control devices for pulse shaping.

A system and method for adaptive illumination, the imaging system comprising an excitation source having a modulator, which generates a pulse intensity pattern having a first wavelength when the excitation source receives a modulation pattern. The modulation pattern is a data sequence of a structural image of a sample. An amplifier of the imaging system is configured to receive and amplify the pulse intensity pattern from the modulator. A frequency shift mechanism of the imaging system shifts the first wavelength of the pulse intensity pattern to a second wavelength. A laser scanning microscope of the imaging system receives the pulse intensity pattern having the second wavelength.

A femtosecond laser source according to an embodiment of the present invention includes: a pulse generator that converts a continuous wave laser into an optical pulse train; a burst generator that separates the optical pulse train into a plurality of burst pulses; a pulse amplification and spectral broadening unit that expands the spectrum by amplifying a plurality of burst pulses; and a pulse compressor that compresses a plurality of amplified burst pulses to generate a femtosecond laser with a pulse width of 1 picosecond (10.sup.−12 s) or less.

Disclosed herein are methods and systems for configuring a raman amplifier. One exemplary system may be provided with a raman amplifier having a plurality of raman pumps and a controller, and a network administration device. The network administration device generates and deploys a first machine learning model and a second machine learning model to the controller of the raman amplifier. A desired gain profile may be automatically assessed using the first machine learning model to determine raman pump configurations for each of the plurality of raman pumps of the raman amplifier. The raman pump configurations for each of the plurality of raman pumps of the raman amplifier may be processed with the second machine learning model to produce an output gain profile. The determined raman pump configurations are deployed only if the output gain profile and the desired gain profile match to within a margin of error.