IEC 61290-1-1:2020

Overview

IEC 61290-1-1:2020 defines the optical spectrum analyzer (OSA) test method for measuring power and gain parameters of single‑channel optical amplifiers (OAs). This fourth edition (2020) applies to commercially available optical fibre amplifiers (rare‑earth doped and Raman), semiconductor optical amplifiers (SOAs), and planar optical waveguide amplifiers (POWAs). The standard establishes uniform requirements for accurate, repeatable measurements of key amplifier metrics using an OSA-based test setup.

Key topics and technical requirements

• Measured parameters

  • Nominal output signal power
  • Gain
  • Polarization‑dependent gain (PDG)
  • Maximum output signal power
  • Maximum total output power
  • Gain ripple (specific test method for SOAs)

• Scope and focus

  • Directed at single‑channel amplifiers; multichannel test methods are covered in IEC 61290‑10 (all parts).
  • Numerical values marked with (‡) are suggested values for assured measurement performance.

• Test method and apparatus

  • Uses an optical spectrum analyzer (OSA) as the core measurement instrument.
  • Typical test setup components: optical source (fixed or tunable), polarization controller, variable optical attenuator, optical power meter (for calibration), and the OSA.
  • Required source characteristics (suggested): full width at half maximum (FWHM) < 1 nm; side‑mode suppression > 30 dB for DFB/DBR/ECL lasers; output power fluctuation < 0.05 dB; source-to-spontaneous-emission power ratio > 30 dB.
  • Procedures for calibration, input/output power measurement, PDG variation, maximum output power tests, and two gain ripple methods (signal gain method and ASE method) are specified.

• Calculations and reporting

  • Defines calculation methods for nominal output, gain, PDG, maximum output metrics, and gain ripple spectra.
  • Specifies required apparatus characteristics and reporting of test results for reproducibility.

Practical applications and who uses this standard

• Manufacturers of OFAs, SOAs, POWAs use the standard to validate product specifications and ensure consistent production testing.
• Test laboratories and QA teams adopt the OSA method for certification, acceptance testing, and comparative benchmarking.
• System integrators and designers rely on the defined parameters (gain, PDG, max output power, gain ripple) to select amplifiers compatible with single‑channel links and to predict link performance.
• R&D engineers use the gain ripple procedures (especially for SOAs) to characterize spectral flatness and noise implications.

Related standards

• IEC 61290‑1 (general test methods)
• IEC 61291‑1 (generic specification for optical amplifiers)
• IEC 61290‑10 series (multichannel amplifier test methods)

Keywords: IEC 61290‑1‑1, optical amplifiers, optical spectrum analyzer, OSA test method, gain ripple, SOA, PDG, optical amplifier testing, OFA, POWA.