Table 1.
Specifications for some commercially available interrogators in the 1550-nm region.
| Parameter | Micron Optics sm125-500 | Micron Optics sm130-700 | Micron Optics si155 Standard | HBM FS22—Industrial BraggMETER (Static) | HBM FS22—Industrial BraggMETER | HBM FS42—Portable BraggMETER | Smart Fibers SmartScope FBG Interrogator | Smart Fibers SmartScan FBG Interrogator | FAZT I4G Interrogator | Optilab FSI-RM-18 | BaySpec WaveCapture® Turn-key FBG Sensing | Ibsen I-MON 256 (512) OEM Monitors |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating principle | Swept laser | Spectrometer | ||||||||||
| Stability (*) (Reproducibility) (pm) | ±1 | ±2 typically, ±5 max | ±1 | ±1 | ±5 | ±2.5 | 3 | <5 | <±1 | ±2.5 | ||
| Repeatability (pm) | ±0.5 at 1 Hz; ±0.2 at 0.1 Hz | ±1 | ±1 | <±0.5 | <±0.5 | ±1.0 | <±2 | <±1 | ±0.05 | ±1 | ± 2 (±5 without internal reference) | ±3 (±5 max) |
| Wavelength range (nm) | 1510–1590 | 1510–1590 | 1460–1620 | 1500–1600 | 1500–1600 | 1500–1600 | 1528–1568 | 1528–1568 | 1529–1568 | Up to 60 | 1525–1565 (1510–1590) |
1525–1570 (1510–1595) |
| Sampling rate (Hz) | 2 | 1000 | 1000 | 1 | Up to 1000 | 1 | 5 | 2500 | 16 | 10–100 | 5 (Fast: ~5000) | |
| Number of optical channels | 4 | 4 (up to 16) | 1 or 4 | 1, 4, or 8 | 1, 4, or 8 | 1, 2, or 4 | 1, 2, or 4 | 4 | 18 | 1 or 4 | ||
| Maximum sensors | 60–120 | 160 × 16 | 125–1000 | 125–1000 | 24–96 | 24–96 | 120 | |||||
| Dynamic range (dB) | 50 | 25 | 25 peak/40 FS | >50 | >25 | >50 | 38 | 38 | >30 | 30 | ||
| Internal wavelength reference | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Option | |
(*) Obtained over full temperature range; measurements accuracy carried out using calibrated instrument against an NIST traceable gas cell.