Pump-Probe

This Ti-Sapphire laser system will be utilized as a part of TARLA pump-probe system. However, before matching with FEL, it will serve to users by oneself.

TAS (Transient Absorption Spectrometer) Technical Specifications

Probe Spectral Range 330-1600 nm
Pump-Probe Delay Range 8 ns or longer
Delay Stage Step Size < 3 fs for 8- pass-configuration
Delay Stage Bidirectional Repeat. < 15 fs for 8-pass-configuration
Delay Stage Maximum Speed 10 ns/s or faster
Time Resolution ~ 1.4 times the pump or probe duration
Intrinsic Time Resolution 14 fs or better
Supported Laser Rate Supported Laser Rate
Visible Camera Range 200 – 1000 nm
NIR Camera Range 650 – 2500 nm
Spectrometer Spectral Range 200 nm – 20 μm
Spectrometer Spectral Resolution 0.13 to 7.95 nm

 

TARLA Table-top laser system @ Pump-Probe Lab.

Parameters Unit Value
Laser Oscillator
Central Wavelength nm 800 ± 10
Average Power mW > 800
Bandwidth (FWHM) nm >70nm
Pulse width fs < 20
Pulse repetition MHz 78
Pulse timing jitter* fs <150
Noise (rms 1Hz-100kHz) % 0,05
Power stability (peak-to-peak for 24 hours) % 0,05
Laser Amplifier
Central Wavelength nm 800 ± 10
Pulse Energy mJ > 13
Pulse width (FWHM) fs < 40
Pulse repetition kHz 1
Pulse timing jitter* fs <150
RMS Energy stability over 24 hours % <0.75
Optical Parametric Amplifiers
Tuning Range 1 Wavelength nm 235 - 1160
Pulse energy µJ > 3- 40
Tuning Range 2 Wavelength nm 1160 - 2600
Pulse energy µJ >250
Tuning Range 3 Wavelength nm 2600 - 4500
Pulse energy µJ > 0.5 - 2
Amplitude amplitude fluxtion (rms) % <1.5
Pulse Timing Jitter* fs <150

TARLA consist of a Transient Absorption Spectrometer (TAS) with following options;

  • Addition of near infrared probe and camera

  • Support for external pump source such as an OPA, NOPA, or harmonics generator

  • Delay range (up to 8.5 ns)

  • Automated system alignment/realignment using patented GuideStar™ technology

  • Reference channels for monitoring and correcting probe fluctuations

  • Sample holder – moving stage or thin flow cell with pump

  • Automated pump power control – shutter or motorized filter wheel

  • Pump reference – useful for very noisy OPAs

  • Parabolic mirror to replace concave mirrors

  • Femtosecond stimulated Raman spectroscopy (FSRS) upgrade

  • Two-dimensional visible spectroscopy upgrade (2D-Vis)

  • Femtosecond Stimulated Raman Spectrometer

* The timing jitters shall be respect to Master Oscillator that has jitter better than 7fs  timing hitter available at TARLA site.

Contact person: Çağlar Kaya (caglar.kaya@tarla.org.tr)

                             Melike Kaya (melike.kaya@tarla.org.tr)