A frequency shifter uses the shift inherent in the acousto-optic interaction to up- or down-shift a laser’s frequency. Two kinds of shifters can be distinguished: the fixed frequency shifter, and the variable frequency shifter. The frequency shift is directly equal to the RF frequency applied onto the transducer (we must not forget that the out put angle is also linked to the frequency : see deflectors).

Various techniques can be used to shift the laser beam, such as multiple travels inside the shifter to double or triple the frequency shift, or a combination of two frequency shifters to achieve low amount of shift (DC to KHz). These devices can be used, for example, in optical heterodyning and interferometric applications, or in laser Doppler velocimetry for particle velocity analysis in sprays. > Download pdf files

Fixed Frequency Shifters:

REFERENCE	Material	Wavelength (nm)	Aperture(mm²)	Frequency(MHz)	Polar	Rise time (ns)	Efficiency
MQ200-A1.5-244.266-Br	SiO2	244-266	1.5 x 2	200	Lin	60	85
MQ180-A1.5-244.266-Br	SiO2	244-266	1.5 x 2	180	Lin	12	85
MQ200-A1.5-266.300	SiO2	266-300	1.5 x 2	200	Lin	60	85
MQ180-A0.2-266.300	SiO2	266-300	0.2 x 1	180	Lin	10	85
MQ180-A0.2-UV	SiO2	325-425	0.2 x 1	180	Lin	10	80
MQ110-A1-UV	SiO2	325-425	1 x 2	110	Lin	15	85
MQ110-A3-UV	SiO2	325-425	3 x 3	110	Lin	50	90
MQ240-A0.2-UV	SiO2	325-425	0.2 x 1	240	Lin	6	70
MTS130-A3-400.442	TeO2-S	400-442	3 x 3	130	Lin	1000	85
MQ180-A0.25-VIS	SiO2	440-660	0.25 x 1	180	Lin	10	70
MCQ110-A2-VIS	Quartz	458-650	2 x 2	110	Lin	50	85
MT350-A0.12-VIS	TeO2-L	450-700	0.12 x 2	350	Lin	5	80
MT250-A0.5-VIS	TeO2-L	450-700	0.5 x 2	250	Lin	8	80
MT250-A0.2-VIS	TeO2-L	450-700	0.2 x 1	250	Lin	5	80
MT200-A0.5-VIS	TeO2-L	450-700	0.5 x 2	200	Lin	8	85
MT200-A0.2-VIS	TeO2-L	450-700	0.2 x 1	200	Lin	5	85
MT110-A1-VIS	TeO2-L	450-700	1 x 2	110	Lin	15	85
MT110-A1.5-VIS	TeO2-L	450-700	1.5 x 2	110	Lin	15	85
MT80-A1-VIS	TeO2-L	450-700	1 x 2	80	Lin	23	85
MT80-A1.5-VIS	TeO2-L	450-700	1.5 x 2	80	Lin	23	85
MTS110-A3-VIS	TeO2-S	458-670	3 x 3	110	Lin	1000	85
MTS40-A2-532.700	TeO2-S	532-700	2 x 2	40	Lin	1000	90

REFERENCE	Material	Wavelength (nm)	Aperture(mm²)	Frequency(MHz)	Polar	Rise time (ns)	Efficiency
MTS40-A3-750.850	TeO2-S	750-850	3 x 3	40	Lin	1000	85
MT350-A0.2-800	TeO2-L	700-950	0.2 x 1	350	Lin	5	80
MT350-A0.12-800	TeO2-L	700-950	0.12 x 2	350	Lin	5	80
MT250-A0.5-800	TeO2-L	700-950	0.5 x 2	250	Lin	6	80
MT250-A0.2--800	TeO2-L	700-950	0.2 x 1	250	Lin	5	80
MT200-A0.5--800	TeO2-L	700-950	0.5 x 2	200	Lin	8	85
MT200-A0.2-800	TeO2-L	700-950	0.2 x 1	200	Lin	5	85
MT110-A1-IR	TeO2-L	700-1100	1 x 2	110	Lin	15	85
MT110-A1.5-IR	TeO2-L	700-1100	1.5 x 2	110	Lin	50	80
MT110-A1.5-IR-Hk	TeO2-L	690-1064 (Ti:Sa)	1.5 x 2	110	Lin	23	80
MT80-A1-IR	TeO2-L	700-1100	1 x 2	80	Lin	23	85
MT80-A1.5-IR	TeO2-L	700-1100	1.5 x 2	80	Lin	50	85
MT250-A0.5-1064	TeO2-L	980-1100	0.5 x 2	250	Lin	8	80
MT250-A0.2-1064	TeO2-L	980-1100	0.2 x 1	250	Lin	5	80
MT200-A0.5-1064	TeO2-L	980-1100	0.5 x 2	200	Lin	8	80
MT200-A0.2-1064	TeO2-L	980-1100	0.2 x 1	200	Lin	5	80
MT110-A1-1064	TeO2-L	980-1100	1 x 2	110	Lin	15	85
MT110-A1.5-1064	TeO2-L	980-1100	1.5 x 2	110	Lin	50	85
MT80-A1-1064	TeO2-L	980-1100	1 x 2	80	Lin	23	85
MT80-A1.5-1064	TeO2-L	980-1100	1.5 x 2	80	Lin	50	85
MTS80-A3-1064Ac	TeO2-S	1030-1080	3 x 3	80	Lin	1000	85
MQ40-A2-L1064-W	SiO2	980-1080	2 x 2	40	Lin	110	80
MQ40-A2-S1064-W	SiO2	980-1080	2 x 2	40	Rand	110	75
MQ40-A3-L1064-W	SiO2	980-1080	3 x 3	40	Lin	110	80
MQ40-A3-S1064-W	SiO2	980-1080	3 x 3	40	Rand	110	65
MCQ40-A2.5-1064	Quartz	980-1080	2.5 x 2.5	40	Lin	115	85

Variable Frequency Shifters: