Laser spectroscopy

For a long time laser spectroscopy has been source of inspiration for EKSPLA scientific laser engineers. Explore some typical applications where our picosecond and nanosecond lasers has been employed.

Laser spectroscopy Photoacoustic imaging Ultra-high intensity
Laser spectroscopy

Supercontinuum generation

Supercontinuum “White Light Lasers” have become a well-established turn-key fiber-laser technology addressing a wide range of applications from biomedical imaging to optical device characterization. They add value due to their unique combination of optical parameters, including an extremely wide spectral coverage from 400 nm to 2400 nm, several W of optical output power, and focus down to the diffraction limit of a perfect Gaussian beam.

The majority of commercial supercontinuum lasers are fully fiber-based systems consisting of a modelocked fiber oscillator as the master seed laser, providing ps pulses at ∼1064 nm and repetition rates in the tens of MHz regime. Injected into a fiber amplifier giving rise to high peak power, and finally a few meters of a specially designed index-guiding PCF with suitable dispersion landscape. The supercontinuum source, when combined with a tunable spectral filter, transforms into a widely tunable laser, making it a versatile laser tool for a wide range of applications.

Principle of Supercontinuum Generation

Principle of Supercontinuum Generation.

Publications

Seeding and pumping Supercontinuum Generation PGx11 PL2210

Mid-infrared, super-flat, supercontinuum generation covering the 2–5 μm spectral band using a fluoroindate fibre pumped with picosecond pulses
M. Michalska, J. Mikolajczyk, J. Wojtas, and J. Swiderski, Scientific Reports , 39138 (2016). DOI: 10.1038/srep39138.
Seeding and pumping Supercontinuum Generation LightWire FFS

On-chip visible-to-infrared supercontinuum generation with more than 495 THz spectral bandwidth
J. P. Epping, T. Hellwig, M. Hoekman, R. Mateman, A. Leinse, R. G. Heideman et al., Opt. Express 23 (15), 19596-19604 (2015). DOI: 10.1364/OE.23.019596.

Recommended products

LightWire FFS

Compact Fiber Seeders for Femtosecond Lasers
  • For femtosecond CPA systems
  • Up to 200 mW; up to 250 nJ per pulse
  • Compressed or chirped pulses, chirp shaping
  • < 140 fs after compression
  • kHz up to MHz pulse repetition rates

PL2210

Diode Pumped Picosecond kHz Pulsed Nd:YAG Lasers
  • Diode pumped solid state design
  • Up to 5 mJ
  • 20 – 80 ps pulses
  • 1 kHz pulse repetition rate

Similar applications

Principle of Laser-Induced Plasma Spectroscopy
Plasma Physics

Laser-induced plasma has been used for different diagnostic and technological applications as detection, thin film deposition, and elemental identification.
Principle of Laser Flash Photolysis
Photolysis

Photodissociation, photolysis, or photodecomposition is a chemical reaction in which a chemical compound is broken down by photons.
Principle of Sum Frequency Generation Vibrational Spectroscopy
SFG spectroscopy

Sum frequency generation vibrational spectroscopy (SFG-VS) is used to characterize vibrational bonds of molecules at surfaces or interfaces.
Principle of Second Harmonic Generation (SHG) Spectroscopy.
SHG spectroscopy / microscopy

SHG measurements provide information about: surface coverage, molecular orientation, adsorbtion-desorbtion processes, and reactions at interfaces.
Principle of Pump-Probe Spectroscopy
Pump-probe spectroscopy

The advantage of pump-probe spectroscopy is direct investigation of dynamics – excitation relaxation, energy transfer, photochemical reactions dynamics and movement of particles, structural changes.
Principle of Solid-phase Photoluminescence Spectroscopy
Solid-phase photoluminescence spectroscopy

Time-resolved Photoluminescence Spectroscopy (TRPL) is a contactless method to characterize recombination and transport in solid materials.

Principle of Gas-phase Ion Luminescence Spectroscopy
Gas-phase ion luminescence spectroscopy

Gas-phase ion luminescence spectroscopy is used to determine intrinsic electronic transition energies in the absence of a disturbing environment.
Principle of Supercontinuum Generation
Supercontinuum generation

Supercontinuum “White Light Lasers” have become a well-established turn-key fiber-laser technology addressing a wide range of applications from biomedical imaging to optical device characterization.
Principle of Time-Resolved Photoconductivity
Time-resolved photoconductivity

Time-resolved photoconductivity (TRMC) are key techniques used to perform the contactless determination of carrier density, transport, trapping, and recombination parameters in charge transport materials.
Z-scan operating principle
Z-scan

In nonlinear optics, z-scan technique is used to measure the non-linear index n2 (Kerr nonlinearity) and the non-linear absorption coefficient Δα.
LIDAR operating principle
LIDAR

LIDAR sends out short laser pulses into the atmosphere, where all along its path, the light is scattered by small particles, aerosols, and molecules of the air and is collected by telescope for analysis.
LIBS operating principle
LIBS

Laser-induced breakdown spectroscopy (LIBS) utilizes a high intensity short laser pulse to convert a very small amount of target material to plasma for optical analysis of the spectra
Principle of Terahertz Spectroscopy
Terahertz spectroscopy

Terahertz time-domain spectroscopy (THz-TDS) probes inter-molecular interactions within solid materials. THz-TDS covers the spectral region of 0.1-10 THz which is a low energy and non-ionizing region of the electromagnetic spectrum.
All applications