The "TM" Series Transmitting Probes are the ideal choice for phase Doppler measurements. They are compact, user-friendly, and provide a wide variety of fringe spacings and waist sizes. This is achieved using TSI's unique XPD50-I internal beam expander/contractor and an assortment of optional focusing lenses from 250 mm focal length to 1000 mm focal length.

The TM series probes are equipped with a convenient rotating mount and sliding base. Beam steering and fiber polishing can be performed by the user, with no need to return the unit to the factory. This is a key advantage, particularly when working with high-power, multi-Watt, water-cooled lasers.