40 GHz Modulator Driver/RF Amplifier (MD-40)

Data Sheet

Product Overview

The Optilab MD-40 Modulator Driver (MD) is a wide band RF Amplifier designed for 40 GHz applications. MD-40 provides a single-ended high voltage to drive an optical modulator, EML or EAM. With 38 GHz useful bandwidth and 30 dB gain, MD-40 can be used as pre-amplifier for analog RF over Fiber link. The MD-40 amplifies beyond 40 Gb/s data input signals to 7.5 Vp-p drive levels. With its flat gain and group delay response, MD-40 yields a high quality, low-jitter electrical drive signal for digital applications. Featuring an anodized, precision-machined aluminum housing, MD-40 is designed for applications during prolonged use.


  • Amplifier RF over Fiber link
  • Analog RF amplification to 38 GHz
  • 40 Gb/s digital modulation
  • OC 768 system
  • General laboratory testing


  • Dual stage amplification design
  • S21 3 dB bandwidth 32 GHz
  • 7.5 Volt peak to peak output
  • Buit in eye crossing and gain adjustment
  • Up to 30 dB small signal gain
  • Built in DC output for modulator biasing

Feature Name Description
General Specifications
3dB S21 Bandwidth 32 GHz typ.
Saturated Output Power >21.5 dBm typ.
RF Gain 30 dB max.
Gain Ripple ±0. 75 dB
Input, Output Impedance 50 Ω
Input Return Loss 10 dB min.
Output Return Loss 10 dB min.
Total Power Dissipation 2.5 W max.
Gain Adjustment Range 10 to 30 dB
Digital Application
Data Rate > 40 Gb/s
Pulse Response 20%~80%, rise time 12 ps typ.
Output Amplitude 7.5 Vp-p max.
Input Range 1.5 V max.
Analog Applications
Useful Frequency Range 30 KHz to 38 GHz (-6 dB)
P1dB Output > 21 dBm typ.
Group Delay (2 to 10 GHz) ± 25 ps
Noise Figure 6 dB typ.
Small Signal Gain 30 dB typ.
Mechanical Specifications
Operating Temperature -20 °C to +60 °C
Storage Temperature -45 °C to +90 °C
Operating Humidity 85%
Power Supply Requirements +12 V DC, 0.2 A max.
Accessories Included 12 V DC power supply PS-12-M
RF Input/Output Connector K Connector Female, AC Coupled
Dimensions 160 mm x 65 mm x 32.5 mm
Remote Control USB port

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