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What is an optical-to-electrical converter module

ODN and passive infrastructure knowledge brief Published 29 May 2025

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Optical‑to‑electrical (O/E) converter modules—such as the Keysight N7004A (DC–33 GHz), N7005A (DC–60 GHz), and Teledyne LeCroy OE6250G‑M (up to 36 GHz)—convert optical communication signals into calibrated electrical outputs for real‑time oscilloscopes. These modules support telecom wavelengths (typically 750–1650 nm) and are used for NRZ, PAM4, and high‑speed optical transmitter testing.Overview

Optical‑to‑electrical converter modules are precision photodetector systems that translate modulated optical signals into electrical waveforms for analysis on high‑bandwidth oscilloscopes. They are essential for characterizing high‑speed optical communication systems, including NRZ and PAM4 formats.

Key Commercial Modules1. Keysight N7004A (33 GHz)
  • Bandwidth: DC to 33 GHz.
  • Wavelengths: 750–1650 nm (supports 850, 1310, 1550 nm).
  • Inputs: Single‑mode & multimode.
  • Applications: 28 Gbps optical testing, reference receiver testing, transmitter characterization.
  • Compatible with: Infiniium UXR, V‑Series, Z‑Series, 90000X/Q oscilloscopes.
2. Keysight N7005A (60 GHz)
  • Bandwidth: DC to 60 GHz (brickwall).
  • Wavelengths: 1310 nm & 1550 nm.
  • Input: Single‑mode (9 µm).
  • Ideal for: 56 Gbaud PAM4, high‑speed coherent and intensity‑modulated systems.
  • Compatible with: Infiniium UXR (≥40 GHz).
3. Teledyne LeCroy OE6250G‑M (up to 36 GHz)
  • Bandwidth:
    • 36 GHz (flat response)
    • 25 GHz (4th‑order Bessel‑Thomson)
  • Wavelengths: 830–1600 nm.
  • Features: Real‑time acquisition, calibrated performance, PAM4 & NRZ analysis tools.
  • Compatible with: WaveMaster 8 Zi, LabMaster 9 Zi‑A, LabMaster 10 Zi.
4. Additional Options (Industry Highlights)
  • Highland Technology J736: DC–12 GHz, InGaAs photodiode, telecom wavelengths.
  • Anritsu MN4765B‑0140: Up to 40 GHz, 1250–1650 nm, ideal for coherent/PAM4 testing.
Typical Applications
  • High‑speed optical transmitter characterization
  • Eye diagram, jitter, and TDECQ measurements
  • PAM4 and NRZ signal analysis
  • Reference receiver emulation
  • System‑level optical interconnect testing
Summary

O/E converter modules provide the calibrated, high‑bandwidth optical detection required for modern photonics and high‑speed communication testing, with leading solutions from Keysight, Teledyne LeCroy, Highland Technology, and Anritsu.

What is an optical-to-electrical converter module - GESTIONVAL ODN INFRASTRUCTURE S.L. [PDF]

What is an optical-to-electrical converter module

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