Models AF3 and AF3-1 are Solid State Amplifiers having a wide bandwidth of 5 Hz to 250 kHz and 1 MHz …]]>

Models AF3 and AF3-1 are Solid State Amplifiers having a wide bandwidth of 5 Hz
to 250 kHz and 1 MHz respectively. The 650 volt (AF3) and 350 volt (AF3-1)
maximum peak to peak output voltages can drive light modulators having a capacitance
of up to 150 picofarads.
These AC coupled amplifiers provide a DC voltage bias for setting the modulator
optical operating point. They are intended for driving the relatively low capacitance of
Lasermetrics Low Voltage Modulators as well as other available transverse field and
reduced voltage devices. Applications include: Broadband Audio and Ultrasonic
communications, Light Chopping and Gating, Data Printing, Polarization and
Optical Control systems employing lasers.
The Model AF3-1 provides four times the bandwidth at more than half the output
voltage of the AF3. These amplifiers were designed for use with Lasermetrics Series
3079 Low Voltage Light Modulators and can be used with similar low voltage light
modulators from other suppliers.

MODELS AF3 AND AF3-1 EXTENDED RANGE AMPLIFIERS DATA SHEET (PDF)

The Model GA-21R Wide Band Amplifier is designed to operate with transverse field modulators, such as Lasermetrics’ EOM- 3079 Series. The …]]>

The Model GA-21R Wide Band Amplifier is designed to operate with transverse field
modulators, such as Lasermetrics’ EOM- 3079 Series. The amplifier is capable of
driving the capacitive load presented by these modulators. It can produce output
voltages that, depending on the wavelength of operation and the modulator aperture
diameter, can provide full modulation depth of the laser beam.
The GA-21R utilizes two Class A output amplifiers driven differentially from a
common, single ended input. The Direct amplifier output is in phase with the signal
input and the Inverted amplifier output is 180o out of phase. A manually adjustable
bias voltage from 0 to ±140 volts (approx.) is available for shifting the modulator
operating point along its characteristic transmission curve.
The outputs may be used independently (single ended) or differentially (double ended)
when connected to a modulator. In the differential mode the voltage seen by the
modulator is twice that of a single channel.
High frequency response of the GA-21R is a function of the load capacitance which includes the modulator
and interconnecting coaxial cables.
Driving a resistive or tuned load is permissible if DC voltage blocking capacitors are used between the
outputs and the load, and proportionally lower output voltages are acceptable.

RoHS

MODEL GA-21R WIDE BAND AMPLIFIER DADA SHEET (PDF)

HIGH VOLTAGE PULSE GENERATOR

The 8025RS Variable Width High Voltage Pulse Generator utilizes highly reliable MOSFET, solid state elements to provide adjustable …]]>

HIGH VOLTAGE PULSE GENERATOR

The 8025RS Variable Width High Voltage Pulse Generator utilizes highly reliable MOSFET, solid state
elements to provide adjustable width, high voltage pulses with fast, symmetrical rise and fall times.
The instrument is useful with electro-optic light modulators such as Lasermetrics’ Series 1040,
1050, 1145, 1147 and 1150 Pockels cells in many applications: laser pulse gating, slicing, and shaping;
and Q-Switching with post-lasing suppression. The 8025RS is also compatible with other low
capacitance, two terminal devices such as piezoelectric transducers.
The 8025RS employs a low jitter, differential high voltage MOSFET switching amplifier which is
triggered from an external event or synchronizing signal. Two trigger inputs are available: a high level
300 S, 5 to 24 volt input; and a 50 S, 5 volt, TTL compatible input. Trigger polarity is +/- selectable.
The 8025RS provides output voltages which are adjustable by means of a front panel control and
meter. Output pulse voltage is insensitive to trigger voltage amplitude. An output pulse will be generated
when the trigger voltage exceeds the minimum level specified to activate the input circuits.
Over the full range of delays and pulse widths, rise and fall times are maintained at less than 15
nanoseconds for output pulse amplitudes between 1.0 and 5.0 kV and pulse repetition rates up to 500
pps.

Two modes of operation are available:
DIRECT mode: internal delay and pulse width functions are disabled and the output pulse width
follows the width of the input trigger pulse. Pulse width range in the DIRECT mode is from about 50
nsec to infinity. Pulse width can be changed from pulse to pulse.
SELECT mode: an output pulse is activated by the leading edge of the trigger pulse. When set to the
SELECT mode, a front panel adjustable in-out delay enables the user to delay the occurrence of the
output pulse and select where, in the optical pulse, slicing, gating, or Q-switching occurs. Output pulse
widths are continuously adjustable from less than 0.1 µs to 999.9 µs.

HIGH VOLTAGE PULSE GENERATOR MODEL 8025 RS DATA SHEET (PDF)