YOKOGAWA AQ6370D Optical Spectrum Analyzer
| Brand | YOKOGAWA |
|---|---|
| Model | AQ6370D |
| Wavelength Range | 600–1700 nm |
| Wavelength Accuracy | ±0.01 nm |
| Wavelength Resolution | 0.02 nm (min) |
| Dynamic Range | 78 dB (typ.) |
| Power Range | +20 to –90 dBm |
| Sweep Time | 0.2 s (for 100 nm span) |
| Fiber Compatibility | Single-mode and multimode fiber |
Overview
The YOKOGAWA AQ6370D Optical Spectrum Analyzer (OSA) is a high-performance benchtop instrument engineered for precision spectral characterization of optical signals in research, development, and production environments. Based on diffraction grating monochromator architecture with dual-pass optical path design, the AQ6370D delivers exceptional wavelength accuracy and resolution essential for characterizing laser diodes, optical filters, WDM components, fiber Bragg gratings, and broadband light sources. Its core measurement principle relies on high-stability mechanical scanning of a calibrated grating combined with thermally stabilized photodetector arrays, enabling traceable, repeatable spectral power distribution (SPD) measurements across the full telecom and near-infrared bands (600–1700 nm). Designed for laboratory-grade reliability, the AQ6370D meets the stringent requirements of optical component qualification, system margin analysis, and compliance verification per ITU-T G.694.1, Telcordia GR-1221, and IEC 61280-2-9.
Key Features
- High wavelength accuracy of ±0.01 nm — achieved via internal He-Ne laser reference and real-time wavelength calibration during sweep
- Ultra-fine resolution down to 0.02 nm — supports detailed analysis of closely spaced DWDM channels and narrow-linewidth lasers
- 78 dB typical dynamic range — enables simultaneous detection of dominant signal peaks and low-level ASE noise or side modes
- Wide optical power measurement range from +20 dBm to –90 dBm — accommodates both high-power pump lasers and ultra-low-level sensor outputs
- Rapid spectral acquisition: 0.2 seconds for a 100 nm span — optimized for high-throughput testing in R&D labs and manufacturing QA lines
- Native compatibility with standard single-mode (SMF-28) and multimode (50/125 µm, 62.5/125 µm) fibers — eliminates need for mode conditioning adapters in most applications
- Integrated polarization-dependent loss (PDL) measurement capability via optional polarization controller module
Sample Compatibility & Compliance
The AQ6370D accepts input via FC/PC, FC/APC, SC/PC, and SC/APC connectors, supporting industry-standard patch cords without signal degradation. It complies with IEC 61326-1 (EMC for laboratory equipment), IEC 61010-1 (safety), and RoHS 2011/65/EU directives. For regulated environments, the instrument supports audit-ready operation when paired with YOKOGAWA’s optional GLP/GMP-compliant software package, which provides electronic signatures, user access control, and 21 CFR Part 11–compliant data integrity features including immutable audit trails and secure data archiving.
Software & Data Management
Controlled via Windows-based AQ6370 Series Application Software, the AQ6370D offers comprehensive data handling including real-time spectrum overlay, pass/fail mask testing, automated report generation (PDF/CSV/XLSX), and remote GPIB/LAN/USB interface support. The software implements IEEE 488.2 and SCPI command sets for seamless integration into automated test systems (ATE). Raw spectral data are stored in vendor-neutral .csv format with metadata headers (timestamp, instrument ID, calibration date, sweep parameters), ensuring long-term reproducibility and third-party analysis compatibility. Optional MATLAB® and Python API libraries enable custom algorithm development for spectral deconvolution, linewidth estimation, and SNR calculation.
Applications
- Characterization of DFB/DBR lasers, VCSELs, and tunable lasers — including center wavelength, SMSR, side-mode suppression, and spectral stability under temperature bias
- WDM system commissioning and troubleshooting — channel power uniformity, OSNR estimation, and filter insertion loss profiling
- Fiber optic component validation — FBG reflection spectra, AWG channel isolation, isolator PDL, and circulator directivity
- Optical amplifier testing — gain flatness, noise figure derivation (with optional ASE subtraction), and saturation behavior
- Academic and teaching laboratories — hands-on instruction in photonics, fiber optics, and spectroscopic principles with calibrated reference standards
FAQ
What wavelength calibration standards does the AQ6370D use?
The instrument employs an integrated He-Ne laser (632.8 nm) as primary wavelength reference, supplemented by periodic verification against NIST-traceable spectral line sources such as Hg/Ar lamps.
Can the AQ6370D measure optical signal-to-noise ratio (OSNR) directly?
Yes — using its built-in interpolation-based noise floor estimation algorithm and user-definable noise bandwidth, OSNR is calculated per ITU-T G.694.1 Annex A methodology.
Is external triggering supported for synchronized multi-instrument measurements?
Yes — the rear-panel TTL trigger input/output supports start/stop synchronization with optical modulators, pulse generators, or other OSAs in multi-channel setups.
Does the AQ6370D require annual recalibration to maintain specification compliance?
YOKOGAWA recommends calibration every 12 months using certified service centers; factory calibration certificates include uncertainty budgets traceable to NMI-Japan (NMIJ).
How is measurement repeatability ensured across different operators and sessions?
Through standardized sweep parameter templates, password-protected configuration locks, and automatic logging of environmental conditions (temperature, humidity) via optional external sensor inputs.
