| Wavelength tuning | |
| C band | |
| Operating wavelength range | 1527.605 nm – 1568.772 nm |
| Operating frequency range | 191.100 THz – 196.250 THz |
| L band | |
| Operating wavelength range | 1568.772 nm – 1611.787 nm |
| Operating frequency range | 186.000 THz – 191.100 THz |
| Laser type | Thermally tuned external cavity diode laser (ECDL) |
| Frequency tuning resolution (wavelength) | 100 MHz (1 pm)(b) |
| Tuning time | < 30 s |
| Spectral characteristics | |
| Linewidth (FWHM), instantaneous(d) | < 100 kHz |
| Side-mode suppression ratio | 40 dB (55 dB typical) |
| Frequency uncertainty (wavelength) | ± 2.5 GHz (± 22 pm)(b, c) |
| Frequency stability (wavelength) | ± 0.3 GHz (± 3 pm)(b) over 24 hours |
| Optical power | |
| Maximum optical output power | S: ≥ 12.5 dBm H: ≥ 14.5 dBm (C-band only) |
| Minimum optical output power | S: ≤ 8 dBm H: ≤ 11 dBm (C-band only) |
| Optical power uncertainty after calibration(e) | ± 0.6 dB |
| Power stability | ± 0.1 dB over 24 hours (2 σ) |
| Output power tuning resolution | 0.01 dB |
| Power flatness, peak-to-peak | 0.5 dB over entire wavelength range |
| Fiber type | Polarization maintaining fiber (PMF) |
| Polarization extinction ratio (PER) | > 18 dB at the polarization maintained fiber output |
| Relative intensity noise RIN (for 13 dBm) | −140 dB/Hz (10 MHz – 40 GHz) |
| Power monitoring | Built-in |
| a. Specifications are valid at 23 °C ± 3 °C. b. Varies slightly according to wavelength. c. Frequency uncertainty includes frequency linearity. d. The laser uses a small FM dithering as part of its wavelength-locking mechanism. The instantaneous linewidth is measured with a 1-ms integration time. e. At maximum output power. f. Maximum weight for quad lasers; other configurations will be lighter. | |
| Size (H x W x D) | 25 mm X 159 mm X 187 mm (1 in x 6 1/4 in x 7 5/16 in) |
| Weight(f) | 0.5 kg (1.1 lb) |
| Temperature — operating | 0 °C to 40 °C (32 °F to 104 °F) |
| Temperature — storage | −40 °C to 70 °C (−40 °F to 158 °F) |
| Relative humidity | 0 % to 80 % non-condensing |
| LTB-2/LTB-8/LTB-12 operation | FTBx-2850 modules are launched and operated from ToolBox. EXFO Connect and Multilink will not recognize or operate FTBx-2850 module. |
| Remote control and automation | Ethernet: SCPI commands or Web UI |
| a. Specifications are valid at 23 °C ± 3 °C. b. Varies slightly according to wavelength. c. Frequency uncertainty includes frequency linearity. d. The laser uses a small FM dithering as part of its wavelength-locking mechanism. The instantaneous linewidth is measured with a 1-ms integration time. e. At maximum output power. f. Maximum weight for quad lasers; other configurations will be lighter. | |