Photodiode Power Sensor THORLABS S120VC

Description

The S120VC power head is designed for general purpose optical power measurements. The head is optimized for small thickness to fit in tight spaces. The highly sensitive photodiode with large active area in combination with an absorptive ND filter enables power measurements up to 500 mW in free-space and fiber-based applications. A removable annular UV/VIS viewing target allows conveniently centering the measured beam to the active area of the photodiode. The target absorbs light from 200 to 525 nm.

The S120VC housing includes a threaded input on axis with the light input aperture that is compatible with any number of Thorlabs 1″ threaded accessories. This allows convenient mounting of external optics, fiber adapters, light filters, and apertures. An 8-32 and M4 threaded mounting hole is provided to accommodate posts and post holders.

The S120VC is compatible with all new Thorlabs display units. A non-volatile memory in the sensor connector contains sensor information data and the NIST and PTB traceable calibration data.

Available Accessories

• S120-FC: FC Fiber Adapter
• S120-SMA: SMA Fiber Adapter
• S120-SC: SC Fiber Adapter
• S120-LC: LC Fiber Adapter
• S120-ST: ST Fiber Adapter
• SM1CP1: Dust Cap (Included)

The S120VC power head is also compatible with Thorlabs’ imperial and metric post and post holder series, as well as SM1-threaded mechanics.

Cleaning and Maintenance

There are no serviceable parts in the S120VC head. The housing may be cleaned by wiping with a soft damp cloth. When cleaning the aperture filter, treat it as any other fine optic. Gently blow off any debris using compressed air and wipe gently with an optic tissue wetted with propanol. If you suspect a problem with your S120VC, please call Thorlabs and an engineer will be happy to assist you.

As long as the sensor has not been exposed to excessive optical power (please pay attention to the maximum ratings in the technical specifications), the calibration should be very stable over long periods of time (well over a year). To keep the accuracy and performance of the S120VC, Thorlabs recommends a yearly recalibration, starting one year after purchase.