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Tunable Pulse Stretcher for Ultrafast Lasers

TPSR Tunable Pulse Stretcher Ultrafast lasers
Steeves Roy

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The PowerSpectrum™ TPSR tunable pulse stretcher is a compact, robust and cost-effective solution to control pulse durations in chirped-pulse amplification (CPA) systems that use a diffraction grating (Treacy) or volume Bragg gratings (VBG) compressor. The tuning feature allows the user to counteract temporal defects from misalignment within the compressor hardware and offset amplifier-induced nonlinear effects. Tunability also reduces the product development cycle times and compensates for manufacturing variations. The all-fiber construction creates a compact and environmentally stable package suitable for a variety of demanding applications. The result is a customizable femtosecond pulse stretcher that enables ultrafast laser systems that are powerful, low-maintenance, and cost-effective.

Early on, TeraXion recognized the emerging importance of ultrafast fiber lasers for industrial and medical applications. The TPSR is specifically designed for the generation of ultrafast pulses as short as 150 fs that are pedestal-free with high energy, average power, and low cost while remaining environmentally stable.

  • Our exclusive FBG dispersion management expertise facilitates accurate phase control, which enables pedestal-free femtosecond pulses.
  • Tunability virtually eliminates the need for compressor hardware temporal alignment and servicing.
  • Our flexible and user-friendly software options make it easy to integrate the TPSR pulse stretcher with any laser design.

To learn more about TeraXion's Twin Peaks, read our application note


Top 5 Features



The TPSR can offset amplifier-induced nonlinear effects for optimal performance at all energy regimes.



Pulse-duration tuning enables a single laser to operate in both the picosecond and femtosecond regimes.


Low Cost

The ingenious, all-fiber design of the TPSR reduces overall system cost, minimizes maintenance and alignment, and increases productivity.



The TPSR is based on the technology of our Telcordia®-qualified telecom products which are still operating after decades of use.

multi channel


Software integration between the TPSR and the laser system enables dynamic and precise pulse control that maintains optimum peak power.

Critical technical specifications

Label Value

Center Wavelength

1 µm   1.5 µm and 2 µm band

FBG Spectral Shape

Customizable, Flat Top, Twin Peaks*

Total Stretching Window

Single FBG: 800 ps
Double FBG: 1 600 ps

Dispersion Tuning

ß2, ß3 and ß4

*1 µm only