Manually adjustable attenuator 
 Wide attenuation range 
 High accuracy 
 Low-noise 
 Compact size 

 Optical communication system 
 Testing tools 
 Optical Experiment 
 Fiber Optic Sensors 

 Parameter 1310 or 1550 1310 & 1550 850,1300 1053,1060,830,780,660 
 Bandwidth (nm) + / -40 + / -40 + / -40 + / -15 
 Attenuation (dB) 0.6? 60 0.8 ~ 60 0.8 ~ 60 0.6 ~ 60 
 Initial loss (dB) <0.6 <0.8 <0.8 50> 50> 30> 40 
 Pigtail type SMF28 SMF28 50/125 or 62.5/125MM special single-mode fiber