TuneStretch – TPSR

TuneStretch (TPSR) tunable pulse stretcher provides a compact, robust, and cost-effective solution for controlling pulse durations in CPA systems using Treacy diffraction gratings or Volume Bragg Grating (VBG) compressors. Group Delay (GD) tuning eliminates the need for moving parts while retaining flexibility in laser output parameters.

This tunability allows users to correct temporal defects caused by compressor misalignment and offset amplifier-induced nonlinear effects. Additionally, it shortens product development cycles and compensates for manufacturing variations, improving the efficiency of laser assembly lines. The all-fiber construction ensures a compact, environmentally stable design suitable for a wide range of demanding applications, resulting in a customizable femtosecond pulse stretcher that enables ultrafast laser systems to be powerful, low-maintenance, and cost-effective.

The TuneStretch platform is compatible with all three quality grades of Chirped Fiber Bragg Gratings (CFBG): Core, High, and Ultra. This versatility allows users to select the optimal grade for their specific laser system requirements, balancing cost, performance, and technical specifications.

Specifically designed for high-energy ultrafast pulses as short as 150 fs, TuneStretch produces pedestal-free pulses with high energy and average power, all while maintaining environmental stability and low cost.

• Ensures precise phase control through exclusive expertise in FBG dispersion management, enabling the generation of clean, pedestal-free femtosecond pulses.
• Virtually eliminates the need for re-alignment and regular maintenance of compressor hardware, speeding up compressor alignment on the production line.
• Allows flexibility in output parameters such as pulse energy, duration, or repetition rate, without moving parts.
• Offers flexible and user-friendly software options for seamless integration into any laser system design.

TuneStretch also features the Twin Peaks gain bandwidth enhancement option, which enables spectral shaping of the input pulse on the pulse stretcher itself. This feature counteracts gain narrowing, allowing for shorter amplified pulses without the need for additional components, such as optical filters.

Key Features and Benefits

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

Versatile:
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.

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

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

Robust:
The TPSR compensates ambient temperature variations, increasing the stability of the laser system.