Keysight Laser Source Modules User’s Guide 23Specifications 3Laser Source Module SpecificationsLaser Source Module Specifications (Standard modules, 0 dBm)Specifications apply to the end of a 2-meter long fiber cable (as specifiedunder fiber type). All specifications are valid for an attenuation setting of0.0 dB.All modules require straight output connectors.Table 3 Standard Laser Source Module Specifications81650A 81651A 81654ALaser Type Fabry-Perot Laser DiodeCenter Wavelength 1 1310 nm±15 nm1550 nm±15 nm1310/1550nm±15 nmFiber Type single-mode 9/125 μmSpectral width (rms) 1, 2 < 3.5 nm < 4.5 nm < 3.5 / 4.5 nmOutput power > 0 dBm (1 mW)CW power stability 3, 4short term (15 min)long term (24 h)to back reflection (RL ≥ 14 dB)< ± 0.005 dBtyp. < ± 0.003 dB with coherence control activetyp. ± 0.03 dBtyp. ± 0.003 dBDimensions (H x W x D) 75 mm x 32 mm x 335 mm (2.8” x 1.3” x 13.2”)Weight 0.5 kgRecalibration Period 2 yearsOperating Temperature 0°C to +45°CHumidity Non-condensingWarm-up time 3 60 minutes1 Central wavelength is shown on display2 rms: root mean square3 Warm-up time 20 minutes, if previously stored at the same temperature4 Constant temperature ΔT = ± 1°C
