AA OptoElectronic have introduced the MT233X2, a new large range fiber pigtailed frequency shifter for IR applications (around 800nm).
It is able to cover the range from -134 to +134MHz.
A visible version is also available.
Please contact us for further information.
Further details on the range of AA-Optoelectronic fibre-pigtailed modulators and frequency shifters can be found here.