Electro-Optical Converter Quality Identification

electro-optical converter is based on the core principle of photoelectric effect and signal modulation synergy. By optimizing conversion efficiency, response time and wavelength accuracy, it achieves high-fidelity conversion of electrical signals to optical signals, transmission stability and multi-protocol compatibility. It is widely used in fields such as optical fiber communications, data center interconnection and laser radar. In 5G fronthaul, it is used in high-speed optical modules for CPRI/eCPRI interfaces; in data centers, it meets the coherent transmission requirements of 400G ZR/ZR+; in laser sensing, it ensures the timing accuracy of pulse modulation. Compared with traditional optoelectronic modules, electro-optical converters have the characteristics of low power consumption, high integration and intelligent management, and are the core components of optical communication networks.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide electro-optical converter quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for electro-optical converter quality appraisal.

With the upgrade of optical communication speed, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: conversion efficiency is not up to standard, eye diagram quality is deteriorated;

2, material defects: laser chip quantum well defect, fiber coupling loss exceeds standard;

3, process problems: insufficient TEC temperature control accuracy, gold wire bonding tensile strength;

4, contract performance dispute: core modules (such as coherent DSP chips, silicon light engine versions) do not comply with the technical agreement.

electro-optical converter litigation quality appraisal mainly includes the following technical methods:

1. Appearance inspection

inspects the appearance of the electro-optical converter, including dimensions, surface finish, packaging integrity, etc.

2. Electrical performance test

Conduct corresponding electrical performance tests according to different types of electro-optical converters, such as photoelectric conversion efficiency, response time, noise characteristics, bandwidth, etc.

An operator of the applicant signed a "400G QSFP-DD Procurement Contract" with an optical module manufacturer of the respondent, agreeing that the bit error rate is ≤10⁻¹². After deployment, links were frequently interrupted. The manufacturer argued that this was caused by fiber link degradation.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "electro-optical converter", contract technical agreement, on-site investigation case materials and other data, and made the following qualitative analysis Quantity analysis opinion:

The laser chip threshold current deviation of the electro-optical converter involved in the case is +15% (agreed ±5%), the TEC temperature control fluctuation is ±0.5℃ (agreed ±0.1℃); the eye height of the eye diagram is only 65% of the agreed value, and the gold wire bonding tensile strength is 3gf (agreed ≥5gf).

The appraisal conclusion determined that chip process and packaging defects are the main reasons for performance degradation.

Electro-optical converter quality appraisal report should include:

1, appraisal purpose (such as communication failure attribution, protocol compliance verification) and reference standards;

2, involved module model, firmware version, production batch;

3, detection method and equipment list ( Such as BERT bit error meter, SEM);

4, detection data and failure correlation analysis (such as the impact of threshold current on eye diagram);