波分复用 WDM (Wavelength Division Multiplexing)是将一系列携带各种信息的不同波长的光载波信号，在发送端经过 合波器 （Multiplexer）汇合在一起并耦合到同一根光纤中进行传输，而在接收端经 分波器 （Demultiplexer）将各种波长的光信号分离出来。 这种在同一根光纤中同时传输两个或众多不同波长光信号的技术，就称为波分复用，即WDM。 WDM技术可以让单根光线的传输容量倍增，可很方便的在现有光网络中扩展容量。 根据传输信号的方向，WDM可用作复用或解复用 …

HYC的 PLC-based CWDM4基于硅基芯片技术，拥有紧凑性、易组装的结构以及很好的可靠性，可替代TFF (薄膜滤波器)型CWDM，并被广泛用在40G、100G高速有源光模块中进行光信号的复用和解复用，如：QSFP+、QSFP28等。

FS passive CWDM mux demux (4-18 channels) greatly saves optical fiber resources for scalable OTN systems with full use of coarse wavelength division multiplexing (CWDM) tech.

Coarse Wave Division Multiplexing (CWDM) is a technology which multiplexes a number of optical signals onto a single fiber by using different wavelengths of light. Omnitron’s iConverter CWDM/X Multiplexer/Demultiplexer (MUX/DEMUX) modules support ITU-T G.694.2 wavelengths between 1270nm to 1610nm in 20nm increments.

2020年8月12日 · Intel与Mellanox的硅光CWDM4模块都采用了基于Echelle grating的Mux，其主要优势是对工艺相对不敏感，只有slab区域厚度的不均匀会导致中心波长的漂移。

2024年2月26日 · 2018年首款CWDM4 Mux/DeMux芯片和组件进入市场，经过最近几年与全球主流光模块厂商的深度合作，目前已经开发出900um/1250um pitch的Mux芯片，以及250um/450um/500um/750um pitch的DeMux芯片和组件，成功地导入了客户的CWDM4、FR4和2×FR4的光模块中，实现了大批量出货。

2024年12月20日 · CWDM MUX/DEMUX system is a passive, optical solution to increase the flexibility and capacity of existing fiber lines in high-speed networks. By adding more channels into available fibers, the CWDM MUX/DEMUX system enables greater versatility for data communications in ring, point-to-point, and multipoint topologies for both enterprise and ...

Corning’s coarse wavelength division multiplexers (CWDMs) are integrated optical modules that mux or demux multiple optical signals of different wavelengths in a single fiber. Our CWDM products separate wavelength into bands of 20 nanometers to cover the complete fiber optical communication spectrum from 1270 nm to 1610 nm.

2020年12月17日 · CWDM Mux/Demux modules are bidirectional passive optical multiplexers and demultiplexers, allowing multiple optical signals at different wavelengths to pass through a single optical fiber strand.

CWDM Mux (fiber optical multiplexer) can combine four, eight, or up to 18 wavelengths onto a fiber. The channel spacing is set to 20 nm in a wavelength range that spans the window from about 1250 to 1650 nm — a window that could include 20 channels.