How to Order LS300 Series LS310 Series LS320 Series NIST Traceable Calibrated Output 1310nm 1550nm 1310nm and 1550nm Center Wavelength 1310nm ±30nm 1550nm ±30nm  1310nm ±30nm 1550nm ±30nm Spectral Width 2nm 2nm 2nm Output Power -10dBm into 9 mm fiber Initial Accuracy ±0.1dB @ 25°C Typical 1 Hour Drift 0.05dB 0.04dB 0.05dB @1310nm 0.04dB @1550nm Typical 12 Hour Drift 0.05dB 0.06dB 0.05dB @1310nm 0.06dB @1550nm Dimensions All Models 4.9 x 2.8 x 1.3" (125 x 70 x 33mm) Weight 5oz. (154g) Ordering Information LS300FC LS300SC LS300ST AO121 LS310FC LS310SC LS310ST AO131 LS320FC LS320SC LS320ST   1310nm Laser Light Source with FC Connector 1310nm Laser Light Source with SC Connector 1310nm Laser Light Source with ST Connector 1310nm Laser Light Source, ST with one Talk Set and headset 1550nm Laser Light Source with FC Connector 1550nm Laser Light Source with SC Connector 1550nm Laser Light Source with ST Connector 1550nm Laser Light Source, ST with one Talk Set and headset 1310 and 1550nm Laser Light Source with FC Connector 1310 and 1550nm Laser Light Source with SC Connector 1310 and 1550nm Laser Light Source with ST Connector