• March 14. 2016

With the optical fiber application develop, the CWDM and DWDM was designed in the optical network . The early fiber optic transmission systems put information onto strands of glass through simple pulses of light. A light was flashed on and off to represent the “ones” and “zeros” of digital information. The actual light could be of almost any wavelength (also known as color or frequency) from rough...

• June 23. 2016

With the development of the optical communication industry,new technology and cost-saving solutions are derived.Such as the widely used of CWDM and DWD.Today we learned about CWDM and DWDM. CWDM is a low-cost WDM transmission technology face to the access layer of metropolitan area network.Saving fiber resources and networking cost.It solves two problems:1.The shortage of optical fiber; 2.Multiser...

• July 06. 2016

With the rapid development of optical communication, there are more and more optical transceivers on the market. The users are not only consider the stability and reliability of the optical transceiver, but also the price and quality and whether to meet the requirements of the equipment and other aspects. However, many people can’t identify the quality of the optical transceiver is good or bad, so...

• July 19. 2016

The time is flying! In the first half of 2016 year, we are enjoy the work and life simply and happily. On the way, we meet sweat and exhaustion, but all this effort is worth. Maybe you will ask why? The development of a project and the receipt of an order, that is the recognition of our efforts! With the steady development of the company, our software engineers are also constantly growing. Under t...

• October 12. 2017

If you are the first time to buy optical transceivers, you might be confused with "DDM", "DOM" or "RGD". What are they? Today, ETU-Link will describe in detail the functions of these three types of optical modules. What is DDM? DDM means Digital Diagnostic Monitoring. It is the technique used in the optical module so that users can monitor the real-time parameters of the module. Including modules’...

• September 17. 2018

If you are the first time to buy optical transceivers, you might be confused with "DDM", "DOM" or "RGD". What are they? Today, ETU-Link will describe in detail the functions of these three types of optical modules. What is DDM? DDM means Digital Diagnostic Monitoring. It is the technique used in the optical module so that users can monitor the real-time parameters of the module. Including modules’...

• September 09. 2025

In the field of optical fiber communications, wavelength division multiplexing (WDM) technology is a key means of increasing optical fiber transmission capacity. As a key offshoot of WDM technology, CWDM (Coarse Wavelength Division Multiplexing) has been widely used in specific scenarios due to its low cost and ease of deployment. Below, ETU will provide a detailed analysis of CWDM, including its ...