II-VI DELAWARE, INC.

This disclosure describes systems and methods for liquid cooling an optical module. A liquid is input to a first port of the optical module. The liquid flows through a channel of the optical module until it is output from a second port of the optical module. Heat generated by the optical module is transferred to the liquid, thereby raising the temperature of the liquid. The flow of the liquid may be controlled by a pump that is operably coupled to a cooler. The cooler may comprise a radiator and fan that reduce the temperature of the liquid before it is reinput to the optical module. Liquid cooling requires less power than other methods than other method for optical module cooling. Cooling the optical module reduces bit error rate though the optical transceiver pathway.

The present disclosure provides a sensor arrangement for reflecting scattered light from a laser beam. The sensor arrangement comprises a first optical element; a cone of a housing disposed behind the first optical element in the direction of the beam path of a laser beam, where the cone of the housing comprises a conical staircase-shaped reflector whose shape corresponds to the shape of the cone of the housing, and where the conical staircase-shaped reflector is formed of a plurality of ring-shaped elements, with each ring-shaped element having reflector surfaces on the inner side facing the beam path of the laser beam; and an element for receiving the light reflected by the respective reflector surfaces of the plurality of ring-shaped elements is arranged on the side of the optical element opposite to the cone of the housing.

Systems and methods are provided for patterned embedding on narrow stripe single mode transverse lasers. An example narrow stripe optical emitter device may include an active region containing semiconductor material, a first embedding region located on a first end of the narrow stripe optical emitter device and containing a first embedding material, and a second embedding region located on a second end of the narrow stripe optical emitter device and containing a second embedding material. The active region may include a ridge running between the first end and the second end of the narrow stripe optical emitter device. The first embedding material may be different from the second embedding material with respect to one or more characteristics. The one or more characteristics may include compressive strain related parameters and/or attributes.

A laser diode includes an active region, confinement layers, and cladding layers. The active region includes one or more active layers that each exert a first strain in a first direction and one or more strain compensating layer that each exert a second strain in a second direction that is opposite the first direction. The confinement layers bound the active region. The cladding layers bound the confinement layers. In some embodiments, each active layer comprises InAs quantum dots in a In r Ga 1-r As quantum well, where 0≤r≤1; and each strain compensating layer comprises a GaAs 1-s P s layer, where 0<s≤1. The confinement layers may each comprise a (Al z Ga 1-z ) w In 1-w P layer, where 0<w<1 and 0≤z<1. The cladding layers may each comprise a (Al y Ga 1-y ) x In 1-x P layer, where 0<x<1 and 0≤y<1.

An example optical device may have a surface-emitting laser structure that includes an active region configured to generate output light, a first distributed Bragg reflector (DBR) disposed below the active region, a second distributed Bragg reflector (DBR) disposed above the active region, a modulation structure that includes electroabsorption material, configured to modulate the output light in response to an applied bias, wherein the modulation structure is disposed within or adjacent to at least one of the first DBR and the second DBR. The electroabsorption material may include graphene or graphene-based composite material. An example method for modulating the output light may include generating a continuous-wave (CW) light in the active region, and then modulating the CW light by the modulation structure, via a bias-dependent absorption provided by the electroabsorption material.

An optoelectronic device for immersion in a liquid coolant includes a printed circuit board assembly (PCBA) having opposing sides and having an optoelectronic component coupled on one side. A lens block mounted to the side of the PCBA encloses a plenum over the optoelectronic component. An opening defined in the lens block forms a reflective surface. The lens block has a first lens facing the optoelectronic component and opposing the reflective surface. The lens block also has a second lens facing a ferrule, which connects to optical fibers and couples to the lens block. A first seal seals the lens block mounted to the PCBA and separates the plenum from the liquid coolant. An insert is disposed in the opening to protect the reflective surface, and a second seal seals the opening and the insert in the lens block. A third seal seals the ferrule to the lens block.

Systems and methods are provided for utilizing machine vision positioning and alignment of wafers for application of lasing patterns. A laser annealing machine that is configured to apply laser annealing to workpieces, may be configured to provide visual positioning and alignment of workpieces for the application of laser annealing. Providing visual positioning and alignment of workpieces includes obtaining, via at least one visual sensing device, visual data representative of a workpiece, identifying, based on the obtained visual data, one or more features or regions in the workpiece, to ensure that the workpiece is centered and aligned when applying the scanning beam to the workpiece. The identifying includes adjusting operation of at least one processing component.

A laser processing head can be used for joining (e.g., welding, brazing, soldering, etc.) workpieces. A collimator collimates laser light, which passes to a beam splitter. The beam splitter has anti-reflective and high-reflective coatings on peripheral and inner areas of the beam splitter. The beam splitter splits the collimated light into central or inner light from the inner area and peripheral light from the peripheral area. A main output in communication with the beam splitter directs at least the peripheral light into a main beam toward the workpieces. For example, a cable can feed a brazing wire adjacent the main beam for brazing the workpieces together. Meanwhile, a secondary output in communication with the beam splitter directs at least the central light into a secondary beam, which can be used to pre-heat the workpiece, post-heat the workpiece, or remove any surface coating from the workpiece.

An assembly is used with an amplifier that amplifies light using source light, pump light, and a doped fiber. The assembly has a plurality of ports, including a first port for input of the source light, a second port for input of the pump light, a third port for output to the doped fiber, a fourth port for input from the doped fiber, and a fifth port for amplified output. A birefringent device in optical communication with each of the ports is configured to refract o-light and e-light components of the light passing therethrough with different refractive indices. For the first and fourth ports, a first half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a first rotation. For the second port, a second half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a second rotation different from the first polarization. A lens is used to focus the light, and an optical filter in optical communication with the lens is configured to reflect the pump light back to the lens and being configured to pass the source light. A rotator in optical communication with the lens is configured to rotate polarization of the light passing therethrough with a third rotation. The third rotation is half of the first rotation, and the first rotation is half of the second rotation. Finally, a wedge reflector in optical communication with the rotator is configured to reflect the light incident thereto. The source light and the pump light are combined and communicated from the second port for output to the doped fiber. Meanwhile, amplified light from the doped fiber is received at the fourth port and is communicated to the amplified output. Reverse light from the amplified output can be isolated from reaching the doped fiber, and reverse source light from the doped fiber can be isolated from reaching the source port.

A laser assembly, such as a flood illuminator, has laser (e.g., VCSEL) emitters on a substrate configured to emit optical signals. An optic structure of optically transparent material, such as a polymer, is formed directly on the substrate, and micro-optic elements are nano-imprinted on the optic structure. The micro-optic elements are arranged in optical communication with the optical signals emitted from the laser emitters to perform field mapping or other optical functions. The laser emitters are on the same surface of the substrate as the optic structure along with electrical contacts so forming the optic structure involves covering the electrical contacts with a protective layer, dispensing a polymer for the optic structure, cutting away portions of the optic structure, removing the remaining protective layer, and exposing the electrical contacts.