High-Speed, High-Accuracy Optical Wavelength Measurement
The ADCMT 8471 measures the wavelength and frequency of laser sources from 630 to 1650 nm for laser diode adjustment, stability analysis, calibration, and automated production testing.
A stabilized He-Ne laser provides the reference wavelength, while the Michelson interferometer method enables high-accuracy measurement across visible and near-infrared wavelengths. The instrument displays wavelength in vacuum or standard air and optical frequency in THz.
630 to 1650 nm
Broad wavelength coverage from visible to near-infrared
±2 ppm ±1 pm
High measurement accuracy in LASER mode
10 Measurements/s
Captures wavelength variation during adjustment and testing
0.0001 nm
Maximum display resolution using ten or more averages
The 8471 supports high-resolution measurement of the emission-center wavelength and frequency of laser diodes used in DWDM systems. Frequency and deviation displays assist with adjustment to an ITU-T frequency grid and evaluation of wavelength drift caused by temperature or current changes.
Up to 10,000 data sets can be stored internally for long-term measurements without a continuously connected PC. Standard USB and GPIB interfaces support automated measurement and external data collection.
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He-Ne Laser Reference
A stabilized He-Ne laser provides the internal wavelength reference for accurate and stable optical wavelength measurement.
Michelson Interferometer Method
Interferometric measurement provides high resolution and accuracy for laser diode wavelength and emission-center-frequency analysis.
Wide 630 to 1650 nm Range
Measure optical signals from 630 to 1650 nm or display the corresponding frequency from 182 to 476 THz.
High-Speed Sampling
A maximum measurement rate of 10 times per second captures wavelength changes during laser adjustment and temperature-related variation.
Resolution Down to 0.1 pm
Standard maximum resolution is 0.001 nm, with 0.0001 nm display resolution available when averaging ten or more measurements.
Wavelength and Frequency Display
Display results in nm using vacuum or standard-air wavelength, or in THz for frequency-based laser adjustment.
Deviation Measurement
Display wavelength deviation from a manually entered reference or a previously measured reference value.
10,000-Data Memory
Store up to 10,000 measurement data sets internally with a configurable measurement interval for extended monitoring.
USB and GPIB Interfaces
Standard USB and GPIB connectivity supports PC data acquisition and integration into automated laser-diode test systems.
DWDM laser diode wavelength adjustment
ITU-T frequency-grid alignment
Laser diode emission-center-frequency measurement
Laser wavelength stability analysis
Wavelength-versus-temperature characterization
Wavelength-versus-current characterization
Optical spectrum analyzer calibration reference
Spectroscope wavelength calibration
Automated laser diode production testing
Long-term optical source monitoring
8471 Specifications
| Measurement Wavelength Range | 630 to 1650 nm |
|---|---|
| Measurement Frequency Range | 182 to 476 THz |
| Measurement Accuracy | ±2 ppm ±1 pm in LASER measurement mode |
| Display Resolution |
1 nm to 0.0001 nm 0.0001 nm resolution requires averaging of 10 or more measurements |
| Display Units |
nm using vacuum or standard-air wavelength THz |
| Sensitivity |
−15 dBm: 630 to 700 nm −20 dBm: 700 to 1000 nm −25 dBm: 1000 to 1650 nm −35 dBm: 1200 to 1600 nm |
| Maximum Optical Input | +10 dBm |
| Measurement Time |
Auto gain: 0.2 s Manual gain: 0.1 s |
| Maximum Sampling Rate | 10 measurements/s |
| Average Measurement | 2 to 100 measurements with moving-average display |
| Deviation Measurement | Displays deviation from a reference measurement value or an entered reference wavelength |
| Data Memory | Up to 10,000 data sets |
| Display Functions | Measured wavelength, maximum wavelength, minimum wavelength, frequency, and deviation |
| Applicable Optical Fiber | Core diameter of 50 μm or less |
| Optical Input |
FC connector Internal fiber: GI 50 μm |
| Interfaces |
USB 2.0 Full-Speed, USB Type-B GPIB, IEEE-488 |
| Analog Output |
Analog output of the lowest three displayed digits 0 to +1 V |
| Power Supply | 100 to 240 VAC, 50/60 Hz |
| Power Consumption | 70 VA or less |
| Operating Temperature | +10°C to +40°C |
| Dimensions | Approx. 424 × 88 × 450 mm (W × H × D) |
| Mass | 11.5 kg or less |
| Safety | IEC/EN 61010-1 Ed. 3 |
| EMC | EN 61326-1 Class A |
Measurement accuracy depends on the spectral linewidth of the input light. An additional error equal to one-tenth of the wavelength full width at half maximum applies according to the input linewidth.
