摘要:
A laser transmitter is disclosed in which the laser combines the outputs of numerous laser diodes using dichroic combination to produce a high power, diffraction limited beam which may be transmitted at minimum beam divergence using the full aperture of the transmitter telescope. The individual diode beams are combined and superimposed in the laser, and are transmitted superimposed in the near and far field of the transmitter telescope. The dichroic combining process is as follows. A collimate beam of a first wavelength is directed at a narrowband or long wave pass filter which is tilted slightly (about 10 degrees). This beam passes through the filter. A beam of a second wavelength is directed toward the exit side of the filter (which acts as a mirror) at such an angle that the second beam is reflected colinear with the first beam and superimposed on it. This process of superimposing the laser beams continues as each laser beam from the laser diodes is added to form a combined laser beam. Before transmission, a sample is extracted from the combined laser beam, and filtered at the discrete wavelengths of the laser diodes to determine if each of the laser diodes needs to be adjusted. When necessary, the laser diodes are thermally adjusted so that their laser beams are at their specific discrete wavelength.
摘要:
A laser infrared light source is mounted on a mount, a mirror ensuring the mode selection, a photodetector being positioned behind the mirror and connected thereto by an optical fibre and a fibre guiding the useful beam. These element are held by resin supports resting on a base plate.
摘要:
A 400G silicon photonic integrated optical module with an embedded thermoelectric cooler (TEC) substrate includes: a housing, a printed circuit board (PCB) substrate, and a silicon photonic integrated circuit board, where an accommodating cavity is formed in the housing; the PCB substrate is provided in the accommodating cavity; a TEC substrate is embedded into the PCB substrate; the silicon photonic integrated circuit board is provided on the TEC substrate; the silicon photonic integrated circuit board is provided with an extended segment; the extended segment extends to one side and to the PCB substrate; a fiber array, an electronic integrated circuit board, a light emission assembly, and a light-receiving detector are arranged on the silicon photonic integrated circuit board; the light emission assembly is mounted on the silicon photonic integrated circuit board; and the light emission assembly and the light-receiving detector are provided above the TEC substrate.
摘要:
An optical transceiver module temperature control device includes a processor, a printed circuit board assembly, an optical transceiver module and a temperature adjustment element. The processor is configured to measure an ambient temperature. The printed circuit board assembly includes a first side and a second side. The first side is opposite to the second side. The optical transceiver module is disposed on the first side of the printed circuit board assembly. The temperature adjustment element is coupled to the processor and disposed on the second side of the printed circuit board assembly. The processor is configured to generate a temperature adjustment signal according to the ambient temperature and an operating temperature range. The temperature adjustment element is configured to perform heat exchange with the printed circuit board assembly according to the temperature adjustment signal to adjust a temperature of the optical transceiver module into the operating temperature range.
摘要:
A RoF communication device includes a RF circuit board and an optical module. The optical module includes a casing, a connection circuit board, an optical transmitting unit and an optical receiving unit. The casing is connected with the RF circuit board. The connection circuit board is accommodated in the casing. The optical transmitting unit is mounted on the connection circuit board. The optical receiving unit is mounted on the connection circuit board. The electrical interface of the RF circuit board is provided in the casing, and the optical transmitting unit and the optical receiving unit are electrically connected with the electrical interface.
摘要:
A method of cooling an optical sub-assembly includes operating a diode mounted to a diode submount structure and cooling the diode with a thermoelectric cooler (TEC) in thermal contact with the diode, wherein the diode is positioned between the diode submount structure and the TEC.
摘要:
Provided is an optical subassembly, which is compact, is easy to manufacture, and has satisfactory high-frequency characteristics. The optical subassembly includes: an eyelet including a first surface, a second surface and a plurality of through-holes; a plurality of lead terminals; a relay substrate including a lead connection surface and a first bonding surface and having first and second conductor patterns formed across the lead connection surface and the first bonding surface; a device mounting unit including a second bonding surface having formed thereon third and fourth conductor patterns; and an optical device configured to convert one of an optical signal and the differential electrical signals into the other. The first and second conductor patterns on the first bonding surface are connected to the third and fourth conductor patterns by bonding wires, respectively, and the first and second bonding surfaces have normal directions in the same direction.
摘要:
There is provided an interface module (200), comprising: an interface (208) for connection with a signal connector (250); a cage (206) for guiding the signal connector towards the interface; and a heat sink (202). The cage (206) comprises a cage portion (212) that is configured to move from a first position to a second position upon insertion of the signal connector (250) into the cage. In the first position, the cage portion is not in thermal contact with the heat sink; when in the second position, the cage portion is in thermal contact with the heat sink. The cage portion (212) comprises one or more apertures (218).
摘要:
A packaged transmitter device includes a base member comprising a planar part mounted with a thermoelectric cooler, a transmitter, and a coupling lens assembly, and an assembling part connected to one side of the planar part. The device further includes a circuit board bended to have a first end region and a second end region being raised to a higher level. The first end region disposed on a top surface of the planar part includes multiple electrical connection patches respectively connected to the thermoelectric and the transmitter. The second end region includes an electrical port for external connection. Additionally, the device includes a cover member disposed over the planar part. Furthermore, the device includes a cylindrical member installed to the assembling part for enclosing an isolator aligned to the coupling lens assembly along its axis and connected to a fiber to couple optical signal from the transmitter to the fiber.
摘要:
Thermal management of a locker etalon in a transmitter optical subassembly (TOSA). In one example embodiment, a TOSA includes a case, a laser positioned within the case and electro-thermally connected to the case, a locker etalon positioned in the case and thermally connected to the case, and a thermoelectric cooler (TEC) positioned within the case and in thermal contact with both the laser and the locker etalon.