Overview - IEC TR 61292-9:2023 (Semiconductor optical amplifiers / SOAs)
IEC TR 61292-9:2023 is the third-edition Technical Report from the IEC 61292 series that describes the characteristic features and measurement considerations for semiconductor optical amplifiers (SOAs). The report focuses on SOAs used for amplifying applications and explains key performance issues such as gain ripple and polarization dependent gain (PDG). Annex A reviews potential and emerging SOA uses (for example, reflective SOAs (RSOAs) in seeded WDM‑PON). This edition updates definitions and measurement guidance and supersedes the 2017 edition.
Key topics and technical highlights
- Scope and focus
- Emphasis on SOAs as optical amplifiers; modulation, switching and nonlinear uses are out of scope.
- Specific SOA features explained
- Gain ripple: origins and effects on amplified signals; theoretical background for measuring gain ripple using amplified spontaneous emission (ASE) spectra.
- Polarization dependent gain (PDG): concepts and implications for polarization-sensitive links; notes on polarization‑insensitive SOA designs.
- Noise figure (NF), carrier lifetime and nonlinear effects: presented as part of SOA behaviour (descriptive, not prescriptive).
- Measurement guidance
- Recommended approaches for measuring SOA output power and PDG, including discussion of narrow‑band vs broadband sources.
- The report adds theoretical material on ASE-based gain ripple measurement and removes the formerly preferred set‑up for some output/PDG measurements to reflect updated practice.
- Technical revisions in 2023 edition
- Revised definitions for SOAs (Clause 3.1).
- Expanded theoretical background on gain ripple using ASE (Clause 4.3).
- Removal of a previously preferred measurement set‑up in Clause 5.
Practical applications and who uses this report
IEC TR 61292-9:2023 is useful for:
- SOA designers and component manufacturers - to understand characteristic behaviors (gain ripple, PDG) that affect device design and qualification.
- Test laboratories and QA engineers - to align measurement approaches for output power, PDG and ASE‑based analyses.
- System architects and network equipment vendors - evaluating SOAs for use as pre‑amplifiers, reach extenders (e.g., GPON/seeded WDM‑PON with RSOAs), and 100 Gbit Ethernet transceiver subsystems.
- Standards developers and researchers - providing background and harmonization points with existing OA test standards.
Related standards (for reference)
- IEC 61292 series - Optical amplifiers (general series).
- IEC TR 61292-3 - Classification, characteristics and applications of OAs (includes SOAs).
- IEC 61290-1-1:2020 - Test methods for power and gain parameters of optical amplifiers (references gain ripple measurement methods).
- IEC 61291-2 - Related harmonization referenced in the TR.
Keywords: IEC TR 61292-9:2023, semiconductor optical amplifiers, SOA, gain ripple, polarization dependent gain, PDG, ASE spectrum, RSOA, WDM‑PON, optical amplifier measurement.