M1000 & M2500 High Voltage Video Amplifiers
Linear amplifiers for >1kV and >1MHz operation
These two new linear amplifiers have been designed to fit between our older M250 and M5000 models in terms of both maximum voltage swing and bandwidth. Both designs consists of two linear amplifiers that together produce a differential output that can be connected to either side of the modulator. This produces an optical phase change equivalent to the output from a single sided 1000V unit in the case of the M1000 and 2500V in the M2500.
The M1000 amplifier has a bandwidth of >1MHz and a rise/fall time of less than 300ns whilst the M2500 achieves >250kHz bandwidth and a rise/fall time <600ns.
Like the M250 design, these amplifiers do not include internal oscillators so an external variable output low signal level source must be connected. The designs retain the DC biasing control of the M250 and so they are ideally suited to driving larger aperture versions of our low-voltage series modulators such as the EM400A/K and EM600A/K transverse field modulators which require DC bias to set the optimum operating point for the most linear modulation. The higher voltage M2500 unit is also capable of drivings other transverse field modulators such as RTP Pockels cells and even some lower voltage BBO cells for analogue modulation applications such as true polarization rotation (when combined with a suitable waveplate)
Specifications
| Parameter | M1000 | M2500 |
| Output Voltage Swing | >1000V (differential) | >2500V (differential) |
| Full amplitude Frequency Response (sinewave) | >1MHz | >250kHz |
| Small Signal Frequency Response (20% Full Amplitude) |
~3MHz | ~500kHz |
| Rise and Fall Time | <300ns | <600ns |
| Input Voltage | -2.5V to + 2.5V | -2.5V to + 2.5V |
| Input Impedance | 50 ohm | 50 ohm |
| Cabinet Form | 63HP width x 3U height rack | 63HP width x 3U height rack |
| Cabinet Size (mm) | 160 (height) x 360 (width)x310 (depth) | 160 (height) x 360 (width)x310 (depth) |
| Mains Voltage | 90 - 264Vac 50/60Hz | 90 - 264Vac 50/60Hz |
Applications
The combination of high bandwidth with substantially higher voltage swing these amplifiers offer compared to the older M250 design has opened up entirely new possibilities for modulation systems. These may now include the larger aperture EM400 and EM600 devices as well as other transverse field modulators such as RTP and this is enabling a whole new range of options for higher optical power analogue modulation in areas such as two-photon microscopy and arbitrary polarization generation at high speeds.
