In the construction of large-capacity main transmission network, DWDM (Optical Dense Wavelength Division Multiplexing System) has become the main body of long-distance trunk transmission network due to its large capacity, support for multiple services, and good scalability. In the DWDM system construction, part of the rack plan is no power supply (such as WDM-PON, etc.). Athermal Arrayed Waveguide Grating (Athermal Arrayed Waveguide Grating) is a new type of pure passive device launched to match the actual field use requirements.
Currently, there are three main types of DWDM technologies developed at home and abroad. They are based on arrayed waveguide grating (AWG—Arrayed Waveguide Grating), dielectric film filter (TFF), and fiber grating (FBG). )Technology. AWG is a planar waveguide device, which is an arrayed waveguide grating made on a chip substrate using PLC technology. Compared with FBG and TTF, AWG has the advantages of high integration, large number of channels, low insertion loss, and easy mass automated production.
Heat AWG uses temperature control circuit and heater to keep the AWG chip in a constant temperature environment of about 70℃, so that the wavelength of each channel of the AWG remains stable. The non-thermal AWG adopts special design and technology, so that the wavelength does not change with the change of external temperature, does not use any heating device and control circuit, and does not require the aid of a circuit. No external circuit control is required. As a pure passive device, it uses self-compensation technology to adaptively control the outside temperature. The center wavelength is not sensitive to changes in outside temperature. It can be widely used in metropolitan area networks and long-distance DWDM optical fiber communications. system.
The athermal AWG module of HYC is based on the arrayed waveguide grating technology and does not require additional power supply or temperature control. It is a pure passive module. It has the characteristics of low loss, polarization-related loss, low crosstalk, etc., and has good stability in the operating temperature range of -40°C to 85°C. HYC can provide 32-channel, 40-channel, and 48-channel athermal AWG modules. These modules can be packaged in a metal box or in a 19-inch rack. At the same time, it can provide optical signal power monitoring ports and other waveband expansion ports in the module.
With the vigorous development of 5G, users will have higher and higher requirements for bandwidth. Operators will need to continuously increase data transmission rates, increase transmission capacity, and reduce operating costs. Among them, the active WDM-PON solution is difficult to deploy on a large scale due to its high cost; while the passive WDM-PON will have more application space due to its low cost, no power supply, and ease of installation. Among them, the non-thermal AWG will be more widely used because of its larger number of channels, denser channel spacing, and no need to rely on power supply or temperature control.
Yiyuantong Company (HYC) is a national high-tech enterprise focusing on R&D, manufacturing, sales and service of optical communication passive basic components. The company’s main products are: optical fiber connectors (high-density optical connectors for data centers), wavelength division multiplexers, optical splitters and other three core optical passive basic components, which are widely used in fiber to the home, 4G mobile communications, Internet data center, national defense communications and other fields.
For more information about the non-thermal AWG, visit Yiyuantong official website: http://www.hyc-system.com