A heat exchanger configured to cool an energy output device, and systems, devices, and methods thereof, can comprise a heat exchanger housing and an internal chamber defined in the housing that is configured to be filled with a phase-change material (PCM). The internal chamber can be provided at a first predetermined level inside the housing relative to the top surface of the housing and can extend under a first predetermined portion of the top surface of the housing. The internal chamber can include a plurality of PCM channels configured to be filled with the PCM and to accommodate phase changes of the PCM in multiple phase-change directions. Optionally, the plurality of PCM channels can be defined by a plurality of fins and/or the internal chamber can be accessible to outside the housing via at least one PCM interface configured to receive and pass therethrough the PCM.

A laser weapon system is described. Particularly, embodiments describe subsystems of a laser weapon system including those necessary for laser generation, operational control, optical emission, and heat dissipation configured to provide a lightweight unit of reduced dimensions.

Various optical systems equipped with diode laser light sources are discussed in the present application. One example system includes a diode laser light source for providing a beam of radiation. The diode laser has a spectral output bandwidth when driven under equilibrium conditions. The system further includes a driver circuit to apply a pulse of drive current to the diode laser. The pulse causes a variation in the output wavelength of the diode laser during the pulse such that the spectral output bandwidth is at least two times larger the spectral output bandwidth under the equilibrium conditions.

An optical module control method is a method for controlling an optical module that includes a semiconductor light emitting element and an electronic cooling module configured to adjust a temperature of the semiconductor light emitting element. The optical module control method includes a step of detecting a temperature of a light emitting unit including the semiconductor light emitting element, and outputting temperature information of the semiconductor light emitting element; a step of detecting an environmental temperature and outputting temperature information of the environmental temperature, the environmental temperature being a temperature of environment where the light emitting unit is placed; and a step of controlling an output of the electronic cooling module on the basis of the temperature information of the semiconductor light emitting element and the temperature information of the environmental temperature, and adjusting the temperature of the light emitting unit.

Embodiments of the present disclosure describe a laser projection apparatus. The laser projection apparatus includes a laser source system, an optical engine, a lens system that are sequentially connected in a laser beam propagation direction, a plurality of circuit boards, a first heat dissipation system, and a second heat dissipation system. The first heat dissipation system is configured to dissipate heat of a first laser assembly in the laser source system, the optical engine, and the plurality of circuit boards, and to make airflow sequentially flow through the above components to form a first heat dissipation path. The second heat dissipation system is configured to dissipate heat of a second laser assembly in the laser source system, the lens system, and the plurality of circuit boards, and to make airflow sequentially flow through the above components to form a second heat dissipation path.

A method for controlling a wavelength of an optical module, includes: a laser light source unit emitting a laser beam; a wavelength filter having a periodical transmission characteristic with respect to a wavelength of light; a temperature controller on which the wavelength filter is placed and that adjusting a temperature of the wavelength filter; a heat generating body placed on the temperature controller; and a control device controlling the wavelength of the laser beam emitted from the laser light source unit and control the transmission characteristic of the wavelength filter based on an intensity of the laser beam transmitted through the wavelength filter, the method including changing at least one of a target value of the wavelength control of the laser beam and a target value of the control of the wavelength filter based on a current value of the heat generating body.

Various optical systems equipped with diode laser light sources are discussed in the present application. One example system includes a diode laser light source for providing a beam of radiation. The diode laser has a spectral output bandwidth when driven under equilibrium conditions. The system further includes a driver circuit to apply a pulse of drive current to the diode laser. The pulse causes a variation in the output wavelength of the diode laser during the pulse such that the spectral output bandwidth is at least two times larger the spectral output bandwidth under the equilibrium conditions.

An optical module includes: a light emitting unit configured to generate light; a mirror mechanism configured to reflect the light generated by the light emitting unit; and a scanning unit configured to scan the light reflected from the mirror mechanism. The light emitting unit includes: a light forming unit including a plurality of semiconductor light emitting elements and a filter that multiplexes light beams from the plurality of semiconductor light emitting elements; and a protective member disposed so as to surround the light forming unit. The mirror mechanism is disposed outside the protective member and integrated with the protective member, and the scanning unit is disposed in a region surrounded by the protective member.

A laser diode array (102) comprising a plurality of laser diodes (201-210) and a channel (212) proximate to each of the laser diodes (201-210), the channel (212) configured to receive and provide a passage for a flow of a fluid coolant; wherein the laser diodes (201-210) are configured to emit electromagnetic radiation having the same centre wavelength at different respective junction temperatures. A coolant supply system (104) coupled to the laser diode array (102) may cause coolant to flow through the channel (212). A flow rate of the coolant through the channel (212) may be controlled based on temperature measurements of the coolant prior to entering, within, and/or after exiting the laser diode array (102).

Embodiments of the present application provide a laser light source and a laser projection device. The laser light source includes a laser assembly, where the laser assembly includes a laser and a circuit board, the laser includes a substrate and a light emitting chip arranged on the substrate, a lateral surface of the substrate is provided with a plurality of pins extending outwards therefrom, the circuit board is arranged on a side where the pins extend, and the circuit board is electrically connected to the pins. The laser light source of the present application features simple assembling and disassembling, reliable performance and relatively low cost.