Tunable Laser Module

The Keysight 81608A tunable laser module offers a peak output power of more than +12 dBm, at least 75 dB/nm above its spontaneous emission level. It features a typical wavelength repeatability of ±1.5 pm at two-way sweeps up to 200 nm/s. The laser’s balance of features, performance and price makes it suitable for both coherent transmission experiments and cost-effective manufacturing-floor component testing.Specifications：Wavelength range: 1240 nm to 1380 nm (Option 113), 1450 nm to 1650 nm (Option 216), 1490 nm to 1640 nm (Option 116).Wavelength resolution: 0.1 pm, 17.5 MHz at 1310 nm (Option 113), 0.1 pm, 12.5 MHz at 1550 nm (Option 116, 216).Continuous sweep range: Full wavelength range.Maximum sweep speed: 200 nm/s, bidirectional.Wavelength stability (typical): ≤ ±2.5 pm, 24 hours.Linewidth (typical), coherence control off: <10 kHz.Effective linewidth (typical), coherence control on: > 50 MHz (1290 nm - 1340 nm) (Option 113), > 50 MHz (1515 nm - 1620 nm) (Option 116, 216).Maximum output power (continuous power during sweep): > +13 dBm peak (typical) (Option 113), > +12 dBm peak (typical) (Option 116, 216).Side-mode suppression ratio (typical): ≥ 70 dB (1290 nm - 1340 nm) (Option 113), ≥ 70 dB (1515 nm - 1620 nm) (Option 116, 216).Relative intensity noise (RIN) (0.1 - 6 GHz): < -150 dB/Hz (typical, 1290 nm - 1340 nm) (Option 113), < -150 dB/Hz (typical, 1515 nm - 1620 nm) (Option 116, 216).Signal to source spontaneous emission ratio: ≥ 75 dB/nm, ≥ 85 dB/0.1 nm.Signal to total source spontaneous emission ratio: ≥ 70 dB.Absolute wavelength accuracy: ±20 pm; typ. ±5 pm (Stepped mode), ±10 pm (Continuous sweep mode, both directions (typical)).Relative wavelength accuracy: ±10 pm; typ. ±3 pm (Stepped mode), ±5 pm (Continuous sweep mode, both directions (typical)).Wavelength repeatability: ±2.5 pm; typ. ±1 pm (Stepped mode), ±1.5 pm (Continuous sweep mode, both directions (typical)).Power repeatability (typical): ±0.01 dB.Power stability: ±0.01 dB (1 hour)