The 980/1550nm wavelength division multiplexer (WDM) is a key component of erbium-doped fiber lasers and amplifiers. 980/1550nm WDM is mostly made of single-mode fiber (SMF) and made by winding fusion tapering method. With the development of optical fiber communication and sensing technology and the successful development of polarization-maintaining fibers, PMF circulators and isolators, more and more systems use PMF and polarization-maintaining devices to package the polarization characteristics of the optical transmission in the subsystem.
High-power lasers operating at 1 μm wavelength, including fiber lasers, diode pumped solid-state (DPSS) lasers, and direct-diode lasers, are increasingly deployed in highly automated manufacturing lines. They enable a wide range of materials processing applications such as welding, cutting, brazing, cladding, surface treating, bulk material heating, highly localized heating, and additive manufacturing. Optimal laser designs can be achieved with the proper selection of semiconductor lasers, specialized optics, and thermal-management solutions.
Optical fiber transmits signals through light guide, non-conductive, and not afraid of lightning strikes, so there is no need to use grounding protection. According to the transmission mode of light in the optical fiber, we divide it into multi-mode optical fiber and single-mode optical fiber.
The semiconductor laser amplifier is small in size, wide in frequency band, and high in gain, but the biggest weakness is that the coupling loss with the optical fiber is too large, and it is easily affected by the ambient temperature, so its stability is poor. Semiconductor optical amplifiers are easy to integrate and are suitable for use in combination with optical integration and optoelectronic integrated circuits.
The main function of EDFA in the optical fiber communication system is to extend the relay distance. When it is combined with wavelength division multiplexing technology and optical arc technology, it can realize ultra-large capacity and ultra-long distance transmission.
The SLED light source is an ultra-wideband light source designed for special applications such as sensing, fiber optic gyroscopes, and laboratories.
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