Features
- Complete instrument with modulator and driver electronics
- Quartz stabilized internal oscillator
- RF-safety circuit to avoid damage by overload
- Custom-designed configuration
Overview
The acousto-optical modulator modifies the intensity of the laser beam. For example, it is used as an acousto-optical chopper for Lock-In detection systems. Its advantage over mechanical choppers is a higher modulation frequency. Besides, it doesn’t generate mechanical vibration which could have negative effects on the signal detection as it doesn’t contain flexible parts. In analog operation the laser intensities can be adjusted at will and time modulated.
The acousto-optical intensity modulator [ AOM ] consists of a modulator element and a driver electronics unit. APE offers instruments for various wavelength and frequency ranges with either digital or analog modulation input.
Specifications
Analog Modulator Drivers | ||||
Carrier frequency | 40 MHz | 80 MHz | 110 MHz | 200 MHz |
Modulation bandwidth | 10 MHz | 20 MHz | 27.5 MHz | 50 MHz |
Modulation input1 [ 600 Ω] | 0 … 5 V | 0 … 5 V | 0 … 5 V | 0 … 5 V |
RF output power2 | ≤1 W | ≤1 W | ≤1 W | ≤1 W |
Contrast Ratio | 1000 : 1 | 1000 : 1 | 1000 : 1 | 1000 : 1 |
Digital Modulator Drivers | ||||
Carrier frequency | 40 Mhz | 80 MHz | 110 MHz | 200 MHz |
Rise time | < 50 ns | < 25 ns | < 20 ns | < 10 ns |
Modulation input1 [ 50 Ω] | TTL | TTL | TTL | TTL |
RF output power2 | ≤1 W | ≤1 W | ≤1 W | ≤1W |
1 Other values on request
2 Higher power on request
Options
- Custom carrier frequency