Technical Specifications:

• Measurement Wavelength Range: 600 nm to 1,700 nm (extended range: 1,200 nm to 1,700 nm standard; 600–1,700 nm with optional filter)
• Wavelength Resolution: 0.01 pm (10 femtometers)
• Wavelength Accuracy: ±0.02 pm (calibrated)
• Wavelength Repeatability: ±0.005 pm
• Measurement Speed: 0.2 seconds (typical)
• Input Optical Power Range: -60 dBm to +10 dBm (with ND filter: -80 dBm to +10 dBm)
• Input Connector: FC/PC (standard); SC/PC, LC/PC available as options
• Display: 5.7-inch color TFT LCD (VGA: 640 × 480 pixels)
• Output Interfaces: GPIB (IEEE-488.2), RS-232C, USB 2.0, Ethernet (100BASE-TX)
• Trigger Input: TTL level (for external trigger)
• Analog Output: 0–5 V DC (wavelength proportional)
• Power Supply: AC 100 V to 240 V, 50/60 Hz
• Power Consumption: Approximately 25 VA
• Dimensions: 210 mm (W) × 85 mm (H) × 320 mm (D) (approximately)
• Weight: Approximately 2.8 kg

Material Composition:

• Housing: Aluminum alloy with matte black anodized finish
• Optical Bench: Zerodur glass ceramic (ultra-low thermal expansion)
• Diffraction Grating: Holographic grating, gold-coated
• Detector: InGaAs photodiode array (for 1,200–1,700 nm); Si photodiode (for 600–1,100 nm with optional filter)
• Connectors: Precision FC/PC with ceramic ferrule

Structural Features:

• Benchtop form factor with built-in handle for portability
• Front panel with large color LCD and membrane keypad
• Optical input port on top of unit for easy fiber connection
• Ventilation slots on rear panel for fan-less passive cooling

Working Principle:
Uses a Michelson interferometer with a moving reference mirror (Fourier transform spectroscopy). The input optical signal is split into two paths — one through a fixed reference arm and one through a moving measurement arm. The recombined beams produce an interference pattern (interferogram) that is detected by a photodiode array. A Fast Fourier Transform (FFT) algorithm converts the interferogram into the optical spectrum, from which the peak wavelength is determined with sub-picometer accuracy using a center-of-gravity algorithm.

Advantages & Highlights:

• 0.01 pm resolution — the highest in its class for telecom wavelength measurement
• ±0.02 pm accuracy eliminates the need for external calibration in most applications
• Wide range (600–1,700 nm) covers visible, O-band, C-band, L-band, and U-band
• Fast 0.2-second measurement speed for production line testing
• Analog output enables real-time wavelength monitoring in feedback control loops

Applicable Industries:

• Telecommunications (DWDM system testing, laser wavelength verification)
• Laser manufacturing (wavelength sorting, quality control)
• Optical component testing (filter characterization, grating analysis)
• Spectroscopy research
• Fiber optic sensor calibration

Installation Requirements:

• Place on a stable, vibration-free optical bench or table
• Avoid direct sunlight and strong ambient light on the optical input port
• Use single-mode fiber for wavelength measurement (multimode fiber reduces accuracy)
• Connect GPIB or Ethernet for remote control in automated test systems

Usage Precautions:

• Do not exceed the maximum input optical power of +10 dBm — use an ND filter for high-power lasers
• Clean the FC/PC connector with lint-free wipes and isopropyl alcohol before each connection
• Allow 15-minute warm-up for best accuracy (the interferometer requires thermal stabilization)
• Do not expose the unit to temperatures outside the 5°C to 35°C operating range