The invention relates to a device (10) for amplifying a laser pulse which comprises a divider section (14) for dividing the laser pulse into multiple sub pulses (43) and for introducing a time delay between the sub pulses (43), a compressor section (15) for compressing the temporally divided sub pulses (43) and a combiner section (17) for combining the compressed sub pulses (44) to one compressed laser pulse (45).

An optical fiber amplification apparatus is disclosed, including an optical receiving port, a first optical output port, a second optical output port, a gain medium, a pump laser, reflection films, and a transmission-reflection film. The pump laser activates a function of the gain medium to amplify an optical signal. A multiplexed optical signal including a first-waveband optical signal and a second-waveband optical signal is incident onto the gain medium. The reflection films enable the multiplexed optical signal to be reflected back and forth in the gain medium. After the first-waveband optical signal reaches a first target gain, the first-waveband optical signal is output from the gain medium to the first optical output port. The second-waveband optical signal is amplified in the gain medium. After the second-waveband optical signal reaches a second target gain, the second-waveband optical signal is output from the gain medium to the second optical output port.

A light source including: a pulse generator for providing a first sequence of light pulses, the first sequence of light pulses including a first number of light pulses within a predetermined time period, a manipulator configured to generate a second sequence of light pulses from the first sequence of light pulses, the second sequence of light pulses having a second number of light pulses within the predetermined time period, the second number being different from the first number, and a nonlinear optical element arranged to receive the second sequence of light pulses.

A monolithic nonplanar ring oscillator (NPRO) laser with a large piezo-electric tuning range and high frequency slew rate, denoted as a μNPRO, is described. A tuning range of 3.5 GHz with 192 volts applied, corresponding to a tuning coefficient of 18.2 MHz/volt was experimentally demonstrated. This performance was achieved by making the solid-state gain element small, with a small distance between a piezo-electric element bonded to the solid-state gain element and a first lase plane in the solid-state gain element. The entire nonplanar ring lasing path within the solid-state gain element may lie within the half of the solid-state gain element closest to the bonded piezo-electric element. This large frequency modulation span and wide frequency modulation bandwidth, combined with unsurpassed coherence and high power, make this an attractive laser for frequency-modulated continuous-wave (FMCW) LIDAR.

This invention provides a pulse shaping technique that can yield a pulsed laser having a smaller energy fluctuation than that of a conventional pulse shaping technique using one or two non-linear optical crystals. A pulse shaping device includes: a non-linear optical crystal group including at least three non-linear optical crystals arranged side by side on an optical path of an input pulsed laser.

Disclosed herein is a method of optical pulse emission including three phases. During a first phase, a capacitor is charged from a supply voltage node. During a second phase, a voltage stored on the capacitor is boosted, and then the capacitor is at least partially discharged through a light emitting device. During a third phase, the capacitor is further discharged by bypassing the light emitting device. The third phase may begin prior to an end of the second phase.

A light source includes: a seed light source configured to output incoherent seed light with a predetermined bandwidth; and a booster amplifier that is a semiconductor optical amplifier configured to optically amplify the seed light input from a first facet, and output the amplified seed light as amplified light from a second facet, wherein the first facet and the second facet of the booster amplifier are subjected to a reflection reduction treatment, the booster amplifier is configured to operate in a gain saturated state, and relative intensity noise (RIN) and ripple are simultaneously suppressed in the amplified light.

An all-fiber configuration system and method for generating temporally coherent supercontinuum pulsed emission are provided. The system includes a sequential structure of all-fiber sections including: a fiber laser seed source to produce a seed pulse with given optical properties; a stretching section including an optical fiber to temporally stretch the seed pulse; an amplification section including an active optical fiber, doped with a rare earth element, to amplify the stretched pulse by progressively stimulating radiation of active ions of the doped active optical fiber; a compressing section to temporally compress the amplified pulse; and a spectrum broadening section including an ANDi microstructured fiber that spectrally broadens the compressed pulse by a nonlinear effect of Self Phase Modulation (SPM) while maintaining the temporal coherence of the pulse.

A method for full-field measurement using Doppler imaging, comprising the following steps: turning on a laser and adjusting the laser; adjusting a spatial filter to obtain circular laser spots having uniform intensity distribution; adjusting a quarter-wave plate and a whole polarizer in a system, and requiring two beams in a reference object and a measured object having different frequencies and perpendicular polarization directions; applying slight pressure to the measured object, setting a charge coupled device (CCD) camera into a continuous acquisition mode, observing interference fringes, and adjusting a light path so that the fringes are clear and visible; setting the sampling frequency, sampling time, captured image format and resolution size of the CCD camera; turning on a lithium niobate crystal drive power switch to produce a heterodyne carrier frequency; applying continuous equal pushing force to the measured object by means of piezoelectric ceramics (PZT) so as to make the measured object produce continuous bending deformation; controlling the CCD camera to sample using a computer, and collecting a set of time series light interference images along with the continuous deformation of the measured object; and processing the time series light intensity interference image to obtain a three-dimensional data module comprising continuous deformation of the measured objects distributed in time and space.

An optical system for suppressing signal noise on an optical fiber, including an input power signal; a pump laser configured to receive the input power signal; a phase modulator coupled to the pump laser configured to modulate, in response to the input power signal, a phase of the pump laser to increase a stimulated Brillouin scattering (SBS) threshold of the pump laser, wherein the pump laser is further configured to: increase a power at the pump laser to be greater than the SBS threshold; generate a back scattering power based on the power of the pump laser being greater than the increased SBS threshold; and limit an output power signal of the pump laser based on the generated back scattering power.