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Fiber-Coupled Acousto-Optic Modulator for Ultrafast Lasers

Fiber-Coupled Acousto-Optic Module (AOM) Pulse Picker
René Dionne

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TeraXion’s fiber-coupled acousto-optic modulator (AOM) is a low rise time modulator used to control the repetition rate of pulses in ultrafast lasers. Its broadband design transmits ultrashort pulses efficiently and, without loss of quality. The AOM’s high damage threshold optics and assembly design ensure long term operation without performance degradation over time.

TeraXion’s AOM is the result of more than 15 years of experience in ultrafast laser components, RF electronics and robust packaging. The AOM pulse picker allows users to choose any repetition rate with a duty cycle of up to 100 %. This reduces the laser oscillators’ fundamental repetition rate. In chirped-pulse amplification systems, a lower repetition rate increases each pulse’s energy for more efficient processing.

TeraXion's RF Driver Unit for AOM

RF Driver Unit

TeraXion offers a 200 MHz driver unit (RF-DU), a low rise time RF driver matched to its acousto-optic modulator (AOM). The RF driver's ultra-flat response delivers the perfect RF signal to extract the best performance from the AOM. The RF-DU allows users to modulate the AOM from 0 to 100% duty cycle. This reduces the laser oscillators’ fundamental repetition rate. 

Top 5 features

Low Rise Time

The AOM distinctly separates the pulse train with a rise time of only 10 ns.

Low Insertion Loss

The AOM transmits pulses efficiently with minimal loss of energy.

Large Passband

The AOM’s anti-reflection coating ensures the broadest transmission for optimal pulse quality.


Only 60 x 22 x 11 mm, for easy integration.

High Damage Threshold

Designed specifically for ultrashort pulses with a high peak power.

Critical technical specifications

Label Value

Rise/fall time

10 ns


1020-1070 nm

Maximum peak power

1 W

Extinction ratio

≥ 45 dB