The Advantest Q8381A is a versatile optical spectrum analyzer that provides accurate and reliable measurements of optical signals. Its key features include a wide wavelength range, high resolution, and excellent sensitivity. The Q8381A is ideal for characterizing optical components, such as lasers, LEDs, and optical fibers, as well as for analyzing optical systems in telecommunications, fiber optics, and optical device testing.

Aumictech – ADVANTEST Q8381 Optical Spectrum Analyzer 350–1750 nm Specifications

Optical Performance

• Wavelength range: 350 to 1750 nm

• Span: 0.2 nm to full span

• Wavelength accuracy: ±0.02 nm (C-band), ±0.05 nm typical across full range

• Wavelength repeatability: ±0.005 nm

• Resolution bandwidth settings: 0.05, 0.1, 0.2, 0.5, 1.0, 2.0 nm

• Sampling resolution: 0.001 nm minimum

Level / Power

• Sensitivity (typical):

  • −80 dBm (1000–1600 nm)

  • −70 dBm (350–1000 nm)

• Maximum safe input power: +20 dBm

• Level accuracy: ±0.3 dB (C-band, −20 dBm input)

• Linearity: ±0.05 dB (−50 to +10 dBm)

• Flatness: ±0.2 dB (350–1750 nm range)

• Polarization dependence: ≤ ±0.05 dB

Dynamic Range & Stray Light

• Dynamic range (typical):

  • Up to 70 dB (0.05 nm RBW, ±1 nm)

  • Up to 55 dB (0.02 nm RBW, ±0.2 nm)

• Stray light suppression ratio: 70 dB typical

• Level range: +20 to −80 dBm

Sweep & Speed

• Sweep times (typical, 100 nm span):

  • FAST mode: 0.5 s

  • NORMAL mode: 2 s

  • HIGH SENS mode: 30–60 s

• Single or continuous sweep modes available

Fiber & Optical Interfaces

• Applicable fibers: Single-mode and multimode (50/62.5/125 µm, 9/125 µm)

• Optical input connectors: FC, SC, ST (via exchangeable adapters)

• Optical return loss: >30 dB typical

• Calibration source: internal wavelength reference included

Interfaces & Control

• Remote control: GP-IB (IEEE-488), RS-232, optional Ethernet with controller

• I/O ports: GP-IB, RS-232, analog out, trigger in/out

• SCPI-compatible command set

Display & Storage

• Display: 9-inch color CRT (vector display)

• Trace functions: 7-trace storage, subtraction, Max/Min hold

• Data output: GP-IB/RS-232 for external logging

• Printer support: external GPIB printer compatible

Physical & Power

• Dimensions: approx. 425 × 200 × 450 mm (W×H×D)

• Weight: approx. 18–20 kg

• Power supply: 100–240 VAC, 50/60 Hz, ~150 VA

• Operating conditions:

  • Performance guarantee: +18 to +28 °C

  • Operating: +5 to +35 °C

  • Storage: −10 to +50 °C

  • Humidity: ≤ 80 %RH non-condensing

• Warm-up time: approx. 1 hour

Calibration & Compatibility

• Calibration: Available with Aumictech NIST-traceable calibration

• Compatibility: Comparable in performance to Yokogawa AQ6315E, making it a strong alternative for labs already using AQ6315E instruments

Why Choose Aumictech for the ADVANTEST Q8381?

The ADVANTEST Q8381 Optical Spectrum Analyzer (350–1750 nm) is a versatile OSA ideal for research labs, universities, and optical manufacturing environments requiring wide wavelength coverage and reliable measurements. At Aumictech, we not only supply the Q8381 but also provide full calibration and repair services, ensuring accurate results. Since it shares performance characteristics with the Yokogawa AQ6315E, many customers choose the Q8381 as a reliable alternative, especially when calibrated by Aumictech.