The Yokogawa AQ6373B is a visible wavelength optical spectrum analyzer engineered for high-speed, accurate spectral analysis across the 350 to 1200 nm range. Part of the AQ6370 Series, it delivers ±0.05 nm wavelength accuracy with resolution down to 0.01 nm (400–470 nm) and 0.02–10 nm across the full spectrum. The instrument achieves -80 dBm sensitivity and ≥60 dB dynamic range through an advanced monochromator, enabling precise measurement of closely spaced spectral lines and weak optical signals. It captures 50,001 data points per sweep while maintaining high wavelength resolution, with measurement speed enhanced by optimized electrical circuits and noise reduction techniques.
Designed for development and manufacturing across laser diodes, fiber lasers, passive devices, and LEDs, the AQ6373B serves biomedical, material processing, consumer product, and telecommunications markets. Built-in optical alignment and wavelength calibration with external reference sources ensure sustained performance. The instrument supports single-mode, multimode, and large-core fiber inputs with small insertion loss variation for enhanced measurement repeatability. A color analysis function addresses VIS applications specifically.
Measurement modes include pulse peak spectrum analysis for pulsed light signals—valuable for transmission loop testing and low-power laser chip characterization—and high dynamic mode to suppress stray light influence from strong signals. Seven sensitivity settings and fast warm-up (within minutes) enable rapid, accurate characterization. Intuitive front-panel control with mouse and keyboard support streamlines operation. Maximum safe input power is +20 dBm.
Technical Specifications
• Wavelength range: 350–1200 nm
• Wavelength accuracy: ±0.05 nm
• Wavelength resolution: 0.01 nm (400–470 nm); 0.02–10 nm (full range)
• Level sensitivity: -80 dBm
• Dynamic range: ≥60 dB
• Maximum safe input power: +20 dBm
• Data sampling: 50,001 points per sweep
• Optical fiber support: Single-mode, multimode, large-core
– Key Features
• Advanced monochromator for high resolution and close-in dynamic range
• Seven sensitivity settings for weak signal measurement
• High dynamic mode for stray-light reduction on strong inputs
• Pulse peak spectrum measurement for pulsed laser analysis
• Built-in optical alignment and external wavelength calibration
• Color analysis function (VIS)
• Fast warm-up and measurement speed
• Low insertion loss variation at input connector
– Typical Applications
• Laser diode and fiber laser development
• Optical filter and FBG characterization
• Biomedical and material processing applications
• Consumer product optics validation
• Telecommunications component testing
– Compatibility & Integration
• Single-mode, multimode, and large-core fiber inputs
• External wavelength reference support
• Mouse and keyboard control
