Seeder for use with a fiber laser for generating an arbitrary shaped pulse, comprising an amplified spontaneous emission (ASE) source, a spectral filter and an arbitrary waveform generator (AWG) modulator, the ASE source for generating a continuous wave (CW) broadband pulse, the spectral filter being coupled with the ASE source for narrowing the CW broadband pulse, and the AWG modulator being coupled with the spectral filter for shaping the narrowed CW broadband pulse to an arbitrary pulse shape.

A laser radar system includes a first light source unit including a signal light source —a seed laser diode or a light source for amplifying a laser beam from the seed laser diode —and a pump laser diode, a second light source unit disposed to be spaced apart from the first light source unit, the second light source unit including an optical amplifier for amplifying a signal output from the first light source unit, and an optical connector for connecting the first light source unit and the second light source unit to each other, wherein the second light source unit is disposed at an end of a laser transceiver unit of the laser radar system.

A laser that emits light at all available frequencies distributed throughout the spectral bandwidth or emission bandwidth of the laser in a single pulse or pulse train is disclosed. The laser is pumped or seeded with photons having frequencies distributed throughout the superunitary gain bandwidth of the gain medium. The source of photons is a frequency modulated photon source, and the frequency modulation is controlled to occur in one or more cycles timed to occur within a time scale for pulsing the laser.

Chirped pulse amplification (CPA) systems configured to generate and amplify multi-pulses are described. The nonlinear interaction of pulses can generate a multiple pulse pack with a dense time separation between pulses. Reducing or eliminating the nonlinear interaction can be provided by spectrally and/or temporally splitting pulses in the chirped amplification system.

A non-reciprocal optical assembly for injection locking a laser to a resonator is described. The laser emits a light beam, and the resonator receives the light beam and returns a feedback light beam to the laser such that the feedback light beam causes injection locking. The non-reciprocal optical assembly is interposed between and optically coupled to the laser and the resonator. The non-reciprocal optical assembly includes a first port that receives the light beam from the laser, and a second port that outputs the light beam to the resonator and receives the feedback light beam from the resonator. The first port also outputs the feedback light beam to the laser. The light beam passes through the non-reciprocal optical assembly with a first power loss, and the feedback light beam passes through the non-reciprocal optical assembly with a second power loss (the first power loss differs from the second power loss).

The present invention discloses a narrow-band, low-noise Raman fiber laser with a random fiber laser pump, pertaining to the technical field of fiber lasers and comprising an ytterbium-doped random fiber laser for producing ytterbium-doped random fiber lasing as the pump of a cascaded Raman random laser; the ytterbium-doped random fiber laser consists of a pump light source, a pump combiner, an ytterbium-doped fiber and a single-mode fiber connected in sequence, as well as a first narrow-band reflector connected to the signal end of the pump combiner. Ytterbium-doped random fiber lasing as the pump of the pump light source disclosed in the present invention is produced by an ytterbium-doped random fiber laser consisting of a narrow-band point reflector, an ytterbium-doped fiber, and a single-mode fiber and further serves as the pump of a Raman light source to achieve random laser output. The Raman fiber laser with a random fiber laser pump provided by the present invention is significantly better in time-domain stability and relative intensity noise than conventional Raman fiber lasers owing to the application of ytterbium-doped random fiber lasing with modeless spectrum as the pump.

A laser system may include one or more seed lasers to generate a pulsed seed beam. The system may further include a pulse pattern generator to generate an intermediate patterned burst-mode beam from at least one laser pulse from the pulsed seed beam, where the intermediate patterned burst-mode beam includes one or more pulse bursts, and where each of the one or more pulse bursts includes a series of laser pulses with a selected pattern of inter-pulse spacings. The system may further include two or more power amplifiers to amplify the intermediate patterned burst-mode beam to form an amplified patterned burst-mode beam, where at least two of the power amplifiers amplify different portions of the intermediate patterned burst-mode beam, and where the amplified patterned burst-mode beam includes a series of amplified pulse bursts including amplified laser pulses with the selected pattern of inter-pulse spacings.

A low-repetition-rate (10-Hz), picosecond (ps) optical parametric generator (OPG) system produces higher energy output levels in a more robust and reliable system than previously available. A picosecond OPG stage is seeded at an idler wavelength with a high-power diode laser and its output at ˜566 nm is amplified in a pulsed dye amplifier (PDA) stage having two dye cells, resulting in signal enhancement by more than three orders of magnitude. The nearly transform-limited beam at ˜566 nm has a pulse width of ˜170 ps with an overall output of ˜2.3 mJ/pulse. A spatial filter between the OPG and PDA stages and a pinhole between the two dye cells improve high output beam quality and enhances coarse and fine wavelength tuning capability.

A compact diode laser achieves high-power, short duration output pulses by separating the lasing action from the pulse-generating mechanism. A diode seed source is configured for gain-switching via a variable RF source. A time lens element includes an intensity modulation device, a phase modulation device, and a pulse compressor. The intensity modulation device carves shorter pulses from the long gain-switched seed pulses, the phase modulation device adds chirp, and the pulse compressor compensates for the chirp while producing high-power short-duration output pulses.

A diamond Raman laser may include a diamond Raman oscillator (DRO) with a first diamond gain medium, a seed laser providing a seed beam at a seed wavelength, and a cavity configured to resonate at a first-Stokes wavelength, the first-Stokes wavelength corresponding to first-Stokes emission in diamond when pumped with the seed wavelength, and where the DRO outputs a first-Stokes beam at the first-Stokes wavelength. The diamond Raman laser may further include a diamond Raman amplifier (DRA) to amplify the first-Stokes beam and generate an amplified first-Stokes beam, where the DRA includes two or more diamond Raman amplification stages, each including one or more second diamond gain media, and one or more optical filters to filter light with a second-Stokes wavelength generated in at least one of the one or more second gain media.