Ultrafast Spectroscopy

Pump and Probe Experiments

Ultrafast spectroscopy laboratory has ultrafast Ti:Sapphire laser oscillator, regenerative amplifier, and transient absorption spectrometer system.  This system can be used as a stand-alone system. The system is also designed such that it can be synchronized with free electron laser to perform pump and probe experiments.

 

  • TARLA Table-Top Ultrafast Laser, Regenerative Amplifier and Optical Parametric Amplifier System

Schematic representation of table-top ultrafast laser system

 

TARLA Table-Top Laser System Technical Specifications

 

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 Ultrafast Transient Absorption Spectrometer (TAS) System

Image of ultrafast transient absorption system (https://www.newport.com/f/transient-absorption-spectrometer)

TARLA Ultrafast Transient Absorption Spectrometer System (TAS) Technical Specifications

Parameters

Unit

Value

Probe Spectral Range

nm

330-1600

Pump-Probe Delay Range

ns

8 or longer

Delay Stage Maximum Speed

ns

10 or faster

Time Resolution

~ 1.4 times the pump or probe duration

Visible Camera Range

nm

200 – 1000

NIR Camera Range

nm

650 – 2500

Spectrometer Spectral Range

nm

200 – 20 000

Spectrometer Spectral Resolution

nm

0.13 to 7.95