Agilent/HP / Optical Attenuator / 8156A/221

Wavelength Range 1200 - 1650nm 
Attenuation Range 60dB 
Fiber Type 9/125um Single Mode 
Connector Type Straight Contact 
Insertion Loss 2.5dB 
Return Loss > 45dB 
Attenuation Accuracy < +/-0.05dB 
Repeatability < +/-0.005dB 
PDL < 0.02dB 
Polarization Mode Dispersion 4fs 
Useful Back Reflection Range 5.0 - 45dB 

OPTION

100: Standard performance, straight contact connector.
101: High performance, straight contact connector
201: High performance and high return loss angled contact connector
202: Back reflectior kit for option 201 and 221(one of 81000SI, 81000FI, 81113PC, 81000UM, 81000BR) 
121: High performance  with monitor output straight contact connector, require 3 connectors interfaces
221: High performance and high return loss  with monitor output, angled contact connector
203: Back reflectior kit for option 201 and 221 (one of 81000SI, 81000FI, 81113PC, 81000UM, 81000BR)
350: 50/125um multimode fiber