Single-optical-port wavelength division multiplexing/demultiplexing photoelectric transceiver device

Abstract

The invention discloses a single-optical-port wavelength division multiplexing / demultiplexing photoelectric transceiver device. A pin and a glass carrier are respectively arranged above and below a collimating lens of the device. A total reflector plate and a band-pass optical filter array are respectively bonded on the upper surface and the lower surface of the glass carrier. A glass partition is arranged below the glass carrier. An optical circulator is arranged above the glass carrier or on one side surface of the glass partition. A laser transmitting module and a detector receiving module are respectively arranged on the two side surfaces of the glass partition. The single-optical-port wavelength division multiplexing / demultiplexing photoelectric transceiver device has the advantages that since the laser module and the detector module share the same multiplexer / demultiplexer and one public optical port, the input and the output of downlink detector signals and uplink laser signals from the same optical port can be realized, the used device cases and the size of a module can be effectively reduced, the miniaturization and the integration of the device and the module are facilitated and the working wavelength of the device can be applied to the situation of simultaneous working of multi-channel wavelength of CWDM (Coarse Wavelength Division Multiplexing) and LWDM (LAN Wavelength Division Multiplexing).

Description

technical field [0001] The invention belongs to the field of optical communication, in particular to a single optical port wavelength division multiplexing / demultiplexing photoelectric transceiver. Background technique [0002] Nowadays, due to the rapid growth of the demand for communication bandwidth, the development of optical devices for wavelength division multiplexing and demultiplexing of multi-channel transmission has made some progress. For example, patents with patent numbers CN201210184192 and US2012 / 0189306 A1 are relatively simple and feasible. However, the detector device and laser device of this type of device or module are independent in two tubes, or the detector component and laser component are assembled in a large tube, but it has an input optical port and an output optical port . So far, there is no device that has only one input and output optical port, so that the laser device and the detector device are transmitted through a common optical port. [...

AI Technical Summary

Problems solved by technology

[0003] At present, the wavelength division multiplexing or demultiplexing schemes adopted by multi-channel devices or modules for high-speed transmission mostly adopt the following methods: The first method is arrayed waveguide grating, referred to as AWG. The advantage of AWG is that it uses waveguide materials, and its integration High, can be prepared with the same substrate as the laser chip and detector chip, and can achieve simultaneous multiplexing and demultiplexing in function, especially when it is applied to more channels such as more than 8 channels, it has great advantages. The working wavelength can be used in CWDM ( Coarse Waverlength Division Multiplexing, coarse wavelength division multiplexing), LWDM (LAN Waverlength Division Multiplexing, local area network wavelength division multiplexing) and DWDM (Dense Wavelength Division Multiplexing, dense wavelength division multiplexing); they also have shortcomings such as high cost, Large loss and difficult coupling

The second way is to etch the grating, which is similar to AWG. It uses waveguide material, which has a high degree of integration and can be prepared on the same substrate as the laser chip or detector chip. Functionally, it can realize multiplexing or demultiplexing. Its volume ratio is higher than that of AWG. The working wavelength can be used in CWDM, LWDM and DWDM; its disadvantages are imperfect filtering characteristics, high cost, large insertion loss and high coupling difficulty, etc.

The third method is a thin-film filter, which has the advantages of low cost, good filtering characteristics, small insertion loss, and large lateral tolerance during coupling. It is suitable for situations with fewer signals such as 16 channels or less. The working wavelength can be used in CWDM and LWDM; its disadvantages are independent components, difficulty in cutting small sizes, and high assembly accuracy

However, the feature of the optical filter is that it is reversible for the uplink and downlink co-channel optical signals, that is, the downlink and downlink co-channel optical signals can pass through the filter without hindrance, and it is suitable for devices with both detectors and lasers. In other words, one optical port cannot be used directly, and special functional components are required to separate the uplink signal from the downlink signal

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