Optical communications: a common classification of optical components
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Optical devices refer to optoelectronic devices with various functions made of photoelectric conversion effects used in the field of optical communications, and are the main components of optical modules.
According to the classification of whether external energy drive photoelectric conversion is required during operation, optical devices are divided into active devices and passive devices; The former is the optical communication system that requires external energy to drive the work, and can convert electrical signals into optical signals or convert optical signals into electrical signals, which is the heart of the optical transmission system; The latter is an optoelectronic device that does not require external energy drive work, which mainly includes optical fiber connectors, fiber couplers, wavelength division multiplexers, optical attenuators and optical isolators, etc., which are the joints of the optical transmission system.
In active devices, the device that converts the electrical signal into an optical signal is called a light source, and the device that converts the optical signal into an electrical signal is called a light detector. Among them, the light source devices mainly include semiconductor light-emitting diodes (LEDs) and laser diodes (LD), and the light detectors mainly include photodiodes (PIN) and avalanche photodiodes (APDs).
According to the functional classification, optical devices can be specifically divided into transmission and receiver devices, wavelength division multiplexing devices, gain amplifier devices, switching devices and system management devices. Among them, the transmitting and receiving device was separated into two independent components in the early days, the optical transmitting component (TOSA) and the optical receiving component (ROSA), and it was not until later with the development of miniaturization that the two were combined into one "optical transmitting and receiving component" (BOSA) with both transceiver functions.
Specifically, optical devices are subdivided into a wide variety of categories, with about 9000 different types.
According to the classification of whether external energy drive photoelectric conversion is required during operation, optical devices are divided into active devices and passive devices; The former is the optical communication system that requires external energy to drive the work, and can convert electrical signals into optical signals or convert optical signals into electrical signals, which is the heart of the optical transmission system; The latter is an optoelectronic device that does not require external energy drive work, which mainly includes optical fiber connectors, fiber couplers, wavelength division multiplexers, optical attenuators and optical isolators, etc., which are the joints of the optical transmission system.
In active devices, the device that converts the electrical signal into an optical signal is called a light source, and the device that converts the optical signal into an electrical signal is called a light detector. Among them, the light source devices mainly include semiconductor light-emitting diodes (LEDs) and laser diodes (LD), and the light detectors mainly include photodiodes (PIN) and avalanche photodiodes (APDs).
According to the functional classification, optical devices can be specifically divided into transmission and receiver devices, wavelength division multiplexing devices, gain amplifier devices, switching devices and system management devices. Among them, the transmitting and receiving device was separated into two independent components in the early days, the optical transmitting component (TOSA) and the optical receiving component (ROSA), and it was not until later with the development of miniaturization that the two were combined into one "optical transmitting and receiving component" (BOSA) with both transceiver functions.
Specifically, optical devices are subdivided into a wide variety of categories, with about 9000 different types.