• May 19. 2026

In data centers, telecommunications networks, and 5G base stations, optical modules play a crucial role in photoelectric signal conversion. Failures in these modules often lead to link interruptions, service disruptions, and incalculable losses. Understanding common optical module failure types is fundamental to effective network operation and maintenance and optimal module selection. I. Four Comm...

• April 28. 2026

Comparative Analysis of PAM4 and NRZ Modulation Technologies PAM4 and NRZ are two mainstream digital signal modulation technologies in optical communication and high-speed data transmission. Their fundamental differences lie in the number of signal levels, transmission efficiency, and anti-interference capabilities. The following analysis will examine them from three dimensions: principles, c...

• April 21. 2026

When customers inquire about "400G optical module requirements," are you also confused about the differences between QSFP-DD, OSFP, and QSFP112? Different packages differ significantly in channel count, heat dissipation, power consumption, and application scenarios. Choosing the wrong package can affect project schedule and cost! Below is a simplified comparison table and key conclusions to help y...

• April 14. 2026

In an increasingly competitive market, comprehensive after-sales service is an indispensable part of sales work. It aims to ensure customers receive timely and professional support during the use of optical modules. ETU-LINK provides the following customer support: I. After-Sales Technical Support 1. 24/7 Service: Providing 7x24-hour technical consultation and fault reporting services, ensuring cu...

• December 01. 2022

In fiber optic networking, many users ask: What are single fiber and dual fiber optical modules? What is the difference between them? How to choose single fiber vs dual fiber for my project? This article explains definition, structure, wavelength, application, compatibility, and selection rules to help you use them correctly. What are single fiber optical modules and dual fiber optical modules?&nb...

• January 14. 2022

CPRI is the abbreviation of Common Public Radio Interface, a standardized communication protocol widely adopted in mobile communication base stations. CPRI plays the role of transmitting baseband I / Q signals to radio units in traditional BS (base station). CPRI has efficient and flexible I / Q data interfaces for various standards, such as GSM, WCDMA, LTE, etc. Unlike the data center, the CPRI o...

• September 18. 2021

As core components for photoelectric conversion in optical communication systems, data center interconnection, and long-haul transmission, optical modules rely on TOSA and ROSA to realize high-speed signal conversion. Now, ETU-LINK will introduce to you the components of the optical module—TOSA and ROSA. 1. What Is TOSA in Optical Modules? TOSA is the main component of the optical transmitter modu...

• October 24. 2018

BIDI optical module only has one optical port, just need one fiber can simultaneously transmit and receive optical signals, is a solution to save fiber resources. BIDI optical module uses WDM technology to realize the bidirectional transmission of optical signals on one optical fiber. Optical module usually has two ports, the TX is the transmitting port, and the RX is the receiving port. BIDI modu...