Burleigh SA-91 Interferometer
Burleigh SA-91 Interferometer,Enables accurate measurement of optical path differences and coherence length. Used for wavelength calibration and fiber dispersion analysis in fiber optic and laser systems. Durable for laboratory applications.
- Model
- Burleigh SA-91
- Calibration
- Available on request
- Price
- $6,479
- Status
- In stock
- RFQ ref
- SA-91
This unit
The Burleigh SA-91 is a high-finesse Fabry-Perot interferometer for precision spectral characterization of narrow-band lasers and optical sources. Built on confocal mirror geometry with thermally stable Invar construction, it delivers high spectral resolution across the visible through near-infrared spectrum. The instrument measures optical path differences, coherence length, laser linewidth, longitudinal mode structure, and frequency stability with exceptional accuracy.
Technical Specifications
- Cavity Design: Confocal mirror geometry
- Free Spectral Range: 2 GHz or 8 GHz
- Finesse: >200 for wavelengths 300 for wavelengths ≥1000 nm
- Minimum Resolvable Bandwidth: FSR/Finesse
- Wavelength Range: 450 nm to 1.8 µm (interchangeable mirror sets); UltraBand™ coverage exceeds 250 nm per set
- Mirror Reflectivity: 99.7% nominal
- Transmission: >10%
- Input Aperture: 1 mm
- PZT Scan Distance: 1.2 µm/1000 V
- PZT Non-Linearity: <1%
- Scan Non-Linearity: <0.1% (with RG-91 electronic compensation)
- Construction: Thermally stable Invar
Key Features
- Interchangeable mirror sets span 450 nm to 1.8 µm without requiring instrument redesign
- UltraBand™ wavelength coverage reduces number of mirror set changes needed during multi-wavelength experiments
- High finesse enables sub-nanometer resolution
- Four-axis alignment mount (SA-900) supports precise cavity positioning
- Integrated PZT scanning with low non-linearity and electronic linearization
Typical Applications
- Laser linewidth measurement
- Longitudinal mode structure analysis
- Frequency stability measurements
- Wavelength calibration
- Fiber dispersion analysis
- Optical path difference measurements
- Surface measurements
Compatibility & Integration The SA-91 operates within a modular system: the RG-91 Ramp Generator supplies piezoelectric scanning voltage with adjustable range, zero offset, and rate, plus non-linearity correction. The DA-100 Detector/Amplifier provides 0.1 V/mW to 1 V/µW sensitivity, 0.3–100 kHz bandwidth, and minimum detectable power of 1 nW (silicon, 633 nm) or 2 nW (germanium, 1.5 µm).
Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 2 GHz or 8 GHz | Voltage / Current Range: 1.2 µm/1000 V (PZT scan) |
| 0 to ±6 V output (DA-100) | Wavelength Range | 450 nm to 1.8 µm |
