A laser light source unit for vehicles, with a resonator containing a first end mirror and a second end mirror, between which an active laser medium is arranged, and with a pump device for generating pump radiation, which can be introduced into the resonator via the first end mirror, wherein a rotatable birefringent medium is arranged in the resonator such that, according to a rotation of the birefringent medium, preferred radiation of different wavelengths is stimulated in the active laser medium.

When a soliton and a dispersive pulse propagate in an optical fiber, they can interact via cross-phase modulation, which occurs when one pulse modulates the refractive index experienced by the other pulse. Cross-phase modulation causes each pulse to shift in wavelength by an amount proportional to the time delay between the pulses. Changing the time delay between the pulses changes the wavelength shift of each pulse. This make it possible to produce pulses whose output wavelengths can be tuned over large ranges, e.g. hundreds of nm, in a time as short as the pulse repetition period of the laser (e.g., at rates of megahertz or gigahertz). Such a laser requires no moving parts, providing high reliability. The laser's optical path can be made entirely of optical fiber, providing high efficiency with low size, weight, and power consumption.

The present application is applicable to laser technology field and provides a dual-wavelength synchronous pulsed fiber laser based on rare earth ions co-doped fiber, which includes a continuous light LD pumping source, a rare earth ions co-doped fiber and two resonant cavities. Sensitizing ions in the rare earth ions co-doped fiber absorb the pumping light and radiate laser of one wavelength. Meanwhile, sensitized ions in the rare earth ions co-doped fiber radiate laser of another wavelength. Laser generated by sensitizing ions is subjected to Q-switching or mode locking with the saturable absorber inserted in the cavity to generate pulsed laser. Generation and partial reabsorption for the pulsed laser modulates gain of the laser radiated by sensitized ions periodically and generates synchronous pulsed laser, thereby implementing a dual-wavelength synchronous pulsed fiber laser.

A laser system comprises a seed module (33) operable to emit a pulse of a first laser beam followed by a pulse of a second laser beam and a plurality of amplification chambers each comprising a gain medium having a gain, wherein the plurality of amplification chambers are arranged to receive the pulse of the first laser beam (45) and amplify the first laser beam in a second order (PA3, PA2, PA1, PA0) and wherein the plurality of amplification chambers are further arranged to receive the pulse of the second laser beam (41) and amplify the second laser beam in a first order (PA0, PA1, PA2, PA3) which is the reverse of the second order. Saturation powers and small signal gain coefficients of the gain media are selected such that the pulse of the first laser beam experiences a total amplification which is less than the total amplification experienced by the pulse of the second laser beam.

An apparatus for emitting pulsed electromagnetic laser radiation includes a laser gain element; an optical arrangement defining a laser resonator and arranged to re-direct radiation emitted by the gain element along a beam path back onto the gain element, the optical arrangement comprising an output coupler configured to couple a portion of the radiation in the laser resonator out of the laser resonator; and, a pump arrangement configured to pump the laser gain element. The optical arrangement includes a mode locker placed in the laser resonator in the beam path, and a birefringent element placed in the laser resonator in the beam path.

A dual-wavelength gun aiming collimated beam light source module, comprising: a positioning seat, having a first through hole and a second through hole inside; a first laser module for emitting laser light of first wavelength; a second laser module for emitting laser light of second wavelength; a first reflecting mirror, and the inner surface of the first reflecting mirror has a first wavelength laser light high-reflection coating; and a second reflecting mirror, and the outer surface of the second reflecting mirror has a first wavelength laser light high-reflection coating and a second wavelength laser light high-reflection coating; so as to solve the aiming deviation problem.

Disclosed is a laser apparatus including a laser generator comprising a laser medium, a pumping light source providing light to the laser medium, a first mirror and a second mirror arranged with the laser medium therebetween, and configured to generate a laser beam of a first wavelength, a secondary harmonic wave generator configured to generate a laser beam of a second wavelength from the laser beam of a first wavelength, a light modulator arranged between the laser medium and the secondary harmonic wave generator and configured to adjust a pulse width of the laser beam of a first wavelength, and an output adjustor configured to adjust an output of the laser beam of a second wavelength generated in the secondary harmonic wave generator.

Disclosed is a servo matching control mid-infrared differential dual-wavelength laser based on Nd:MgO:PPLN, The 813 nm semiconductor pumping source, the energy transmitting optical fiber, the first focusing lens, the second focusing lens, the first 45-degree beam splitter, the mid-infrared idle frequency light output mirror, the polarized crystal, the servo motor, the mid-infrared parametric light total reflection mirror, the microprogrammed control unit, the second 45-degree beam splitter, the electro-optical crystal and the 1093 nm fundamental frequency light total reflection mirror are sequentially placed from right to left in a straight cavity of the laser; and the 1084 nm fundamental frequency light total reflection mirror is placed in a bent-shape cavity of the laser, corresponding to a position of the second 45-degree beam splitter, such the second 45-degree beam splitter can reflect incident light to the 1084 nm fundamental frequency light total reflection mirror.

The technology described in this document can be used to implement an optical device for producing optical pulses that includes an optical oscillator including at least one optical arm including at least one piece of fiber and at least one optical filter, a starting arm coupled to the at least one optical arm to generate spikes of radiation for the optical oscillator to start pulsation, and an optical switch coupled between the optical oscillator and the starting arm to connect the starting arm to the at least one optical arm to start the optical oscillator using the spikes of radiation generated by the starting arm.

A technology is described for a Photonic Integrated Circuit (PIC) radio frequency (RF) oscillator. The PIC RF oscillator can comprise an optical gain media coupled to a first mirror and configured to be coupled to the PIC. The PIC can comprise a first optical cavity located within the PIC, a tunable mirror to form a first optical path between the first mirror in the gain media and the first tunable mirror, and a frequency tunable intra-cavity dual tone resonator positioned within the first optical cavity to constrain the first optical cavity having a common optical path to produce tow primary laser tones with a tunable frequency spacing. A photo detector is optically coupled to the PIC and configured to mix the two primary laser tones to form an RF output signal with a frequency selected by the tunable frequency spacing of the two primary tones.