Acousto-Optic Modulator Drivers
3W, 80, 100, 200, 300 MHz
Features
- High Stability
- Temperature Insensitive
- Compensated Linear Response
Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Frequency | 80 ± 0.01% | 200 ± 0.01% | MHz | |
| Driving Power [1] | 0.1 | 3 | W | |
| Repetition Rate | 15 | MHz | ||
| Supply Voltage | +24 | V | ||
| Supply Current | 280 | mA | ||
| Return Loss | 40 | dB | ||
| Voltage Standing Wave Ratio | 1.2:1 | |||
| Polarization Extinction (PM Only) | 18 | 20 | 25 | dB |
| Modulation Mode | Analog | |||
| Control Signal Voltage | 0 | 5 | V | |
| Output Impedance | 50 | Ω | ||
| AOM Interface | SMA | |||
| Control Interface | SMA | |||
| Operating Temperature | -5 | 60 | °C | |
| Storage Temperature | -45 | 85 | °C |
Notes:
- This is for generating internal grating. The power level is preset, but can be adjusted with a screw driver through the side hole.
Applications
- AOM
Description
The AOMD is a high-performance acousto-optic modulator driver designed to optimize optical output response to an electrical control signal. It features four working mode setting switches for application-specific adjustments and offers digital TTL, analog 0-1V, and 0-5V control modes, as well as a digital/analog mode where the analog signal controls digital intensity. The driver generates a temperature-insensitive wave at a fixed frequency matching the acoustic-crystal resonance, delivering up to 3W driving power with a 24V DC input. It includes a pre-distortion circuit to improve linearity for both digital and analog optical response. The SMA modulation control input varies the diffraction amplitude, enabling precise optical control of output light intensity.
For optimal performance and to prevent damage, the AOMD must not be powered when open or shorted. Proper grounding is essential, and the unit should be mounted on a metal structure for heat dissipation.
Mechanical Dimensions (mm)
A diagram shows the physical dimensions of the unit. Key dimensions include length (106.5 mm), width (97.0 mm), and height (33.0 mm). It also indicates connection points for VCC (+24V), TTL, Analog, and AM (Output).
Connection Diagram
A block diagram illustrates the system setup. A laser source connects to an acousto-optic device, which then connects to a laser receiver. A 24V power supply powers an RF Driver. The RF Driver receives TTL modulation control signal and Analog modulation control signal.
Installation Instruction
Heat Dissipation
The product uses conduction cooling and must be installed on a metal structure with flat, adequately thick surface and sufficient clearance for heat dissipation.
Power Connection
Operates on a +24V DC power supply. The power connector has a through-core capacitor. Connect the core to the positive terminal and the ground plate to the negative terminal via a wire. The +24V connector is a 0.9mm diameter legacy pin with an integrated ground ear.
Signal Output & Impedance Matching
The signal output port has a 50Ω impedance. Do not power the unit if the signal output interface is open or short-circuited, as this may damage the product.
Grounding & Performance Stability
Ensure proper grounding for optimal performance and to minimize interference. Output power is adjusted via a multi-turn potentiometer; clockwise rotation increases power, counterclockwise decreases it. The adjustment range exceeds 15 dB.
Static Protection
The product is sensitive to static electricity; use appropriate ESD protection during handling.
Typical Output Spectrum
Two spectrum analyzer plots are shown. Both display a peak around 80 MHz with a bandwidth of 10.0 kHz. One plot is for '0 Volts Input' and the other for '5 Volts Input', both showing similar spectral characteristics.
Ordering Information
| Prefix | Type | Power | Frequency | Package |
|---|---|---|---|---|
| AOMD- | Analog = 11 Digital = 22 Both = 33 |
3W = 3 100W = H |
80MHz = 8 100MHz = 1 200MHz = 2 300MHz = 3 |
Module = 1 Box [1] = 2 Special = 0 |
[1]. This is a laboratory benchtop AOM driver that integrates a power supply with 110-240V AC power. It has SMA control signal input and a power adjustment knob on the front panel.
Operation Instruction/Manual
1. Laser wavelength
The acousto-optic modulator is wavelength sensitive. The input laser beam's wavelength must match the modulator's nominal wavelength to avoid increased insertion loss.
2. Optical fiber connection
Ensure all connectors are clean and the connector type matches.
3. RF Output connection
Use the provided SMA cable to connect the 'RF Output' of the driver to the acousto-optic modulator.
4. Power supply connection
Connect the 'Vcc +24V' and the negative plate of the driver to a power supply. Incorrect connection to positive and negative electrodes will cause severe damage to the driver and modulator.
5. Analog modulation mode
Set switches S1, S2, S3, and S4 to the down position. Connect the analog control signal to the 'Analog' SMA port. The driver will operate with an analog response.
6. Digital TTL modulation mode
Set switch S4 to the up position, and S1, S2, S3 to the down position. Connect the TTL control signal to the 'TTL' input. The driver will operate with a sharp on/off TTL response.
7. Digital/Analog modulation mode
Set all switches (S1-S4) to the low position. Connect the TTL signal to the 'TTL' SMA port and a 0-5V analog input to the 'Analog' SMA port. The RF output's sharp on/off is controlled by the TTL input, while its magnitude is controlled by the Analog input level.
8. Mode control summary
A table summarizes the function of the four switches (S1-S4) for controlling the driver's working mode, detailing positions (Up/Down) and corresponding working modes (TTL, Analog, Both).
9. Adjustment of driver output power
Warning: The RF output power is factory-matched. Adjust only if necessary. Use a flat-head screwdriver to turn the 'AM' knob. Clockwise increases power; counterclockwise decreases it.
Application Notes
- Output impedance: 50Ω.
- The driver must not be operated without a load or with a shorted output. Operating without a load or with a shorted output can damage the driver.
- Heatsink for driver: The driver generates heat during operation. Mounting it on a heatsink or a large metal plate is strongly recommended to prevent damage from high temperatures.
- Ensure the driver is well grounded for optimal performance.
- Handle optical fibers with caution.
- Always cover connectors with caps when they are unplugged.
Legal notices: All product information is believed to be accurate and subject to change without notice. Information contained herein shall legally bind Agiltron only if it is specifically incorporated into the terms and conditions of a sales agreement. Some specific combinations of options may not be available. The user assumes all risks and liability whatsoever in connection with the use of a product or its application.
Rev 06/19/25
© Photonwares Corporation
Contact: +1 781-935-1200 | sales@photonwares.com | www.agiltron.com
Information contained herein is deemed to be reliable and accurate as of the issue date. Photonwares reserves the right to change the design or specifications at any time without notice. Agiltron is a registered trademark of Photonwares Corporation in the U.S. and other countries.
