A compact laser is provided for in accordance with an exemplary embodiment in the present disclosure includes a compact resonator structure using a non-planar geometry of bulk components. The laser includes a preferred rotational direction of lasing modes and employs bulk components for establishing the preferred rotational direction of lasing modes within resonator. In some embodiments, the preferred rotational direction of lasing modes is established using a reflective element that is outside the resonator structure. In some embodiments, the reflective element induces polarization shifts in the reflected light that are compensated for by a wave plate, which may be outside the resonator structure.

This disclosure relates to pumping light systems and methods for using a disc laser. A focusing device with a reflecting surface focuses a pumping light beam onto a laser-active medium. A deflecting system deflects the pumping light beam between reflecting regions formed on the reflecting surface that are arranged in different angle regions around a central axis of the reflecting surface in at least a first annular region and a second annular region. The deflecting systems are configured to perform at least one deflection of the pumping light beam between two reflecting regions of the first annular region and at least one deflection between two reflecting regions of the second annular region.

The invention relates to an optical waveguide with at least one core region (1) extending along the longitudinal extent of the optical waveguide, and with a first jacket (2) which, viewed in the cross section of the optical waveguide, surrounds the core region (1). The invention further relates to an optical arrangement with such an optical waveguide, and to a method for producing the optical waveguide. The object of the invention is to make available an optical waveguide for high-performance operation, which is improved in relation to the prior art in terms of mode instability. The invention achieves this object by virtue of the fact that the optical waveguide consists of crystalline material at least in the core region (1).

It is an object of the present invention to provide a small and simply-structured light-source device. A light-source device according to the present invention includes a laser light source section, a stem on which the laser light source section is mounted, a cap with an opening, the cap being bonded to the stem in such a manner that the cap covers the laser light source section, a lens holder joined to an outer surface of the cap in such a manner that the lens holder extends over the opening, and a collimating lens supported by the lens holder, the collimating lens collimating a light ray emitted from the laser light source section and then passing through the opening.

Provided is a laser oscillator including: one or more heat generating parts disposed in a housing; a piping system through which cooling water flows to the one or more heat generating parts; a water cooling type dehumidifier that dehumidifies air inside the housing using the cooling water; and an air cooling type dehumidifier that includes a Peltier element attached with a cooling fin and a radiating fin and includes a cooling water plate configured to cool the radiating fin with the cooling water, wherein the air cooling type dehumidifier starts to dehumidify the air inside the housing using the cooling fin while the cooling water is not flowing and dehumidifies the air inside the housing by cooling the radiating fin using the cooling water plate when the cooling water is flowing.

A tunable narrow-linewidth single-frequency linear-polarization laser device comprising a heat sink, a pumping source packaged on the heat sink, a first and second collimating lenses, a laser back cavity mirror, a thermal optical tunable filter, a rare-earth-ion heavily-doped multicomponent glass optical fiber, a super-structure polarization-maintaining fiber grating, a polarization-maintaining optical isolator, a polarization-maintaining optical fiber, and a thermoelectric refrigerating machine. The laser device uses a short and straight single-frequency resonant cavity structure, the heavily-doped and high-gain characteristics of the multicomponent glass optical fiber, a frequency selection role and wavelength tuning function of the thermal optical tunable filter and the superstructure polarization-maintaining fiber grating, and combines a precision temperature adjustment technology, and by means of real-time adjustment of distribution of reflection wavelengths and transmission wavelengths, the laser device changes spectrum peak overlapping positions, so as to implement stable output of wide-tuning-range, extra-narrow-linewidth, high-extinction-ratio and high-output-power continuously tunable single-frequency linear-polarization laser.

The present disclosure relates to a fiber encapsulation mechanism for energy dissipation in a fiber amplifying system. One example embodiment includes an optical fiber amplifier. The optical fiber amplifier includes an optical fiber that includes a gain medium, as well as a polymer layer that at least partially surrounds the optical fiber. The polymer layer is optically transparent. In addition, the optical fiber amplifier includes a pump source. Optical pumping by the pump source amplifies optical signals in the optical fiber and generates excess heat and excess photons. The optical fiber amplifier additionally includes a heatsink layer disposed adjacent to the polymer layer. The heatsink layer conducts the excess heat away from the optical fiber. Further, the optical fiber amplifier includes an optically transparent layer disposed adjacent to the polymer layer. The optically transparent layer transmits the excess photons away from the optical fiber.

An optical fiber cleaving apparatus that employs a microchip laser system for cleaving an optical fiber is disclosed. The microchip laser system is operably arranged relative to an optical system that receives an initial laser beam and forms a focused laser beam that includes a focus spot. The focus spot is directed to the outer surface of the optical fiber to create an optical damage zone that includes at least one micro-crack necessary for performing the cleaving operation. Methods of aligning the optical fiber to the focus spot and performing the cleaving operation using the cleaving apparatus are also disclosed.

The present disclosure is generally directed to techniques for thermal management within optical subassembly modules that include thermally coupling heat-generating components, such as laser assemblies, to a temperature control device, such as a thermoelectric cooler, without the necessity of disposing the heat-generating components within a hermetically-sealed housing. Accordingly, this arrangement provides a thermal communication path that extends from the heat-generating components, through the temperature control device, and ultimately to a heatsink component, such as a sidewall of a transceiver housing, without the thermal communication path extending through a hermetically-sealed housing/cavity.

An apparatus includes a heat exchanger with a body having a passage through the body. The passage defines apertures on multiple sides of the body, and the passage is configured to allow optical signals to pass through the body. One or more tapered edges are at least partially around one or more of the apertures, and each tapered edge is configured to reflect optical radiation inward into the passage. One or more absorptive surfaces are within the passage, and the one or more absorptive surfaces configured to absorb the reflected optical radiation. The heat exchanger is configured to convert the absorbed optical radiation into heat, and the body further includes one or more cooling channels configured to receive coolant that absorbs the heat.