The core technology behind the Dazzler, also known as the Acousto-Optic Programmable Dispersive Filter (AOPDF), operates through a longitudinal interaction within a birefringent crystal.

Specially developed for multi-dimensional spectroscopy experiments, the streaming mode allows to simultaneously load and play over 100 000 pre-defined pulse shapes at repetition rates up to 500Hz.

A typical use of this option is to scan the delay between 2 pump pulses, combined with multi-step phase cycling.

This option also provides additional synchronization outputs for easy interfacing with mechanical delay stage and detection device.

CEP modulation

This option, included in the 19” rack generator, allows to modulate and control the CE Phase of the optical pulse at repetition rates up to 30kHz, without changing dispersion.

For single-shot and high bandwidth CEP stabilization loop of amplifiers, or interferometer stabilization.

Jitter-free

Mandatory for CEP sensitive experiments.

This option locks the internal MHz clock of the Dazzler electronics with the MHz clock of the ultrafast oscillator. As a result, optical jitter  below 100 attoseconds can be achieved routinely.

High power RF amplifier

As diffraction efficiency is inversely proportional with the bandwidth, and proportional with the applied RF power, Fastlite has developed a series of High-Power RF amplifiers to ensure the maximum diffraction efficiency for octave-spanning laser pulses.

20W and 50W (exclusively in the 19” rack generator format) amplifiers, are available.

Octopuzz

The Octopuzz is an advanced synchronization tool, generating kHz-rate trigger signals divided from an internal or external MHz clock.

Logical functions between inputs and outputs allow advanced sequence management between laser, Dazzler, choppers, photodiodes, cameras, mechanical stages, etc…

Dazzler / Wizzler combination for automated pulse compression optimization

The combination of the Dazzler pulse shaping capabilities with the Wizzler high dynamic range measurement provides the most powerful compression optimization tool.

Fastlite, with its Wizzler product line, introduces the use of the standard deviation (sigma) of the time-intensity profile over the complete temporal window of the measurement to gain insights on the quality of your pulse. Comparing this measured value with the FTL sigma value on the same temporal window quantifies the loss of coherent contrast due to phase aberrations, and provides a good indication of the pulse compression quality at several orders of magnitude below the main peak intensity.

While performing a pulse compression optimization using the Wizzler & Dazzler feedback loop, one can observe the reduction of the standard deviation of the compressed pulse at each feedback iteration.
When the pulse is fully compressed, the measured standard deviation is lowered down to the FTL value, meaning that pre-pulses have been reduced and pulse peak intensity has been maximized.

Day to day reproducible results

Large-scale laser systems can be quite sensitive to alignment and environmental conditions. This is one of the main reasons why experimental results are hard to reproduce from day to day.

Adjustable loop settings to fit with any laser

Most of CPA systems operate in the saturation regime to extract more energy with a better stability. However, this adds coupling effects and non-linearities, and makes direct correction of the phase unpracticable.

The combination of the Dazzler or high repetition rate Dazzler shot to shot and dispersion-free CEP control, with the multi-kHz single-shot CEP detection of the Fringeezz allows to build high bandwidth Carrier Envelope Phase stabilization loops.

Principle – Key benefits

Plug & play

Although the Fringeezz can be used with any high speed and high accuracy CEP actuator, its combination with the Dazzler CEP control module is effortless, providing almost instantaneaously dramatic improvement of the CEP stability.

Up to 5kHz retroaction bandwidth – Loop efficiency demonstrated on 100kHz systems.
Since the Fringeezz measures the CEP error for all laser shots at repetition rates up to 10kHz, The retroaction bandwidth can be as high as 5kHz, thus eliminating most of the frequency noise contributions. Indeed, the Power Spectral Density data of a closed loop system evidence a residual white noise structure: all distinctive drifts and noise contributions from mechanical or atmospheric origin have been eliminated.

Applications

CPA or OPCPA Carrier Envelope Phase stabilization

The Dazzler / Fringeezz feedback loop has already demonstrated record CEP stability values on Fastlite high flux MIR OPCPA systems.

Data below shows the result of a Mach-Zhender interferometer stabilization at 7kHz, resulting in a sub 25mrad rms phase noise (single-shot).

CEP versus time.
red: open loop, black: closed loop: 25mrad rms single shot Power Spectral Density
red: open loop, black: closed loop

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These two add-ons, by offering both accuracy and reliability for long-term synchronization, are a must-have for demanding applications such as ultrafast pump-probe experiments, or integrated into secondary sources such as FELs, ICS and OPAs.

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The result of several years of intensive research and development efforts, Amplitude’s Compress pulse shortening extensions reduce pulse durations well below <100 fs beyond the intrinsic capabilities of all other laser systems on the market.
The patented design of Compress delivers ultrashort pulse duration down to few cycle with the highest throughput efficiency, preserves exceptional beam quality, and provides pristine short and long term stabilities.
Compatible with our entire product range, Compress enables users to apply novel and unique approaches to material processing as well as explore ultrafast phenomena at unprecedented repetition rates and uptime with few-cycle time resolution.

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