The optical module (opTIcal module) is composed of an optoelectronic device, a functional circuit, an optical interface, and the like, and the optoelectronic device includes two parts, a transmitting and receiving unit.
Simply put, the function of the optical module is photoelectric conversion, and the transmitting end converts the electrical signal into an optical signal. After transmitting through the optical fiber, the receiving end converts the optical signal into an electrical signal.
The transmitting part is: an electric signal inputting a certain code rate is processed by an internal driving chip to drive a semiconductor laser (LD) or a light emitting diode (LED) to emit a modulated light signal of a corresponding rate, and an optical power automatic control circuit is internally provided therein. The output optical signal power remains stable. The receiving part is: the optical signal input module of a certain code rate is converted into an electrical signal by the photodetecting diode. After the preamplifier, the electrical signal of the corresponding code rate is output.
Under the background of the continuous development of the optical communication industry, optical module companies continue to conduct mergers and acquisitions, vertically integrate the industrial chain, and further increase the concentration of the industry. Well-known optical module manufacturers have:
At present, the major companies in the optical module industry include Finisar, Avago, Source Photonics, Guangruntong, WTD and Huagong Zhengyuan.
(1) FinisarFounded in 1987, Finisar is headquartered in Silicon Valley, San Francisco Bay Area, California. It is one of the world's largest and most technologically advanced optical communication device suppliers, covering telecommunications, optical displays, security systems, medical devices, and environmentally friendly equipment. Aviation and defense systems, etc.
Founded in 1961, Avago is a provider of design, development and supply of a wide range of analog semiconductor devices to customers worldwide, for applications in wireless and wireline communications, industrial, automotive, consumer electronics and storage and computer applications and terminals. market.
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