PL2230 series
Diode-pumped high-energy picosecond Nd:YAG laser
The PL2230 series systems are diode-pumped, mode-locked Nd:YAG solid-state lasers that deliver picosecond pulses at a repetition rate of up to 100 Hz and pulse energies of up to 40mJ.
Developed and manufactured by:
Features
- With diode-pumped amplifier for pulse energies up to 40 mJ at 1064 nm
- Improved beam profile thanks to highly developed beam shaping system
- Hermetically sealed DPSS Master Oscillator
- Diode-pumped regenerative amplifier
- With water-air chiller
- <30 ps pulse duration
- Excellent pulse duration stability
- Up to 100 Hz repetition rate
- Optional streak camera triggering with <10 ps jitter
- Excellent beam position stability
- Optional temperature-stabilized second, third and fourth harmonics
- Software-controlled
- Control panel
Applications
- Time-resolved fluorescence spectroscopy (incl. streak camera measurements)
- SFG/SHG spectroscopy
- Nonlinear spectroscopy
- Laser-Induced Breakdown Spectroscopy (LIBS)
- OPG Pumps
- Remote laser sensing
- Satellite Ranging
- Further applications in the field of spectroscopy and non-linear optics.
Applications
Destruction for precise findings
Laser-induced plasma spectroscopy (LIBS) is a fast, non-destructive method for determining the elemental composition of materials. An intense laser pulse generates a plasma on the sample surface whose characteristic emission is analyzed. LIBS is suitable for almost all types of material …
Emission that provides insights
Photoluminescence spectroscopy (PL) is a non-contact method for investigating the electronic and structural properties of materials. The material is excited by light and the emitted radiation is analyzed. This spectral information provides information about band gaps, defects, doping or quantum structure. PL is particularly valuable for semiconductors, nanostructures and optoelectronic materials
You can see better with the second one
Second harmonic generation (SHG) is a non-linear, non-invasive optical effect in which two photons are combined into one with twice the frequency in media without inversion symmetry. SHG spectroscopy enables real-time investigation of surface processes, molecular orientation and low analyte concentrations.
The sum makes the difference
SFG spectroscopy (Sum-Frequency Generation) is a non-linear optical method for investigating molecules on surfaces and interfaces (e.g. solid-liquid, solid-gas). Two laser beams – one visible and one infrared – are superimposed to generate a sum frequency signal that can only be …
Applications
Scientific publications
Ultrafast transient absorption spectra and kinetics of human blue cone visual pigment at room temperature
A. Krishnamoorthi, D. Salom, A. Wu, K. Palczewski, and P. M. Rentzepis, Proceedings of the National Academy of Sciences 121 (41), e2414037121 (2024). DOI: 10.1073/pnas.2414037121.
The ultrafast photochemical reaction mechanism, transient spectra, and transition kinetics of the human blue cone visual pigment have been recorded at room temperature. Ultrafast time-resolved absorption spectroscopy revealed the progressive formation and decay of several metastable photo-intermediates, corresponding to the Batho to Meta-II photo-intermediates previously observed with bovine rhodopsin and human green cone opsin, on the picosecond to millisecond timescales following pulsed excitation. The experimental data reveal several interesting similarities and differences between the photobleaching sequences of bovine rhodopsin, human green cone opsin, and human blue cone opsin. While Meta-II formation kinetics are comparable between bovine rhodopsin and blue cone opsin, the transition kinetics of earlier photo-intermediates and qualitative characteristics of the Meta-I to Meta-II transition are more similar for blue cone opsin and green cone opsin. Additionally, the blue cone photo-intermediate spectra exhibit a high degree of overlap with uniquely small spectral shifts. The observed variation in Meta-II formation kinetics between rod and cone visual pigments is explained based on key structural differences.
A primary radiation standard based on quantum nonlinear optics
S. Lemieux, E. Giese, R. Fickler, M. V. Chekhova, and R. W. Boyd, Nature Physics 15 (6), 529-532 (2019). DOI: 10.1038/s41567-019-0447-2.
The black body remains the most prominent source of light for absolute radiometry. Its main alternative, synchrotron radiation, requires costly and large facilities. Quantum optics offers a new radiometric source: parametric down-conversion (PDC), a nonlinear optical process, in which pairwise photon correlations enable absolute calibration of photodetectors. Since the emission rate crucially depends on the brightness of the electromagnetic field, quantum-mechanical fluctuations of the vacuum can be seen as a seed of spontaneous PDC, and their amplitude is a natural radiometric standard. Thus, they allow for the calibration of the spectral radiance of light sources by measuring the ratio between seeded and unseeded PDC. Here, we directly use the frequency spectrum of the electromagnetic vacuum to trigger spontaneous PDC and employ the generated light to infer the spectral response of a spectrometer over a broad spectral range. Then, we deduce the absolute quantum efficiency from the spectral shape of PDC in the high-gain regime, without relying on a seed or reference detector. Our results compare well with the ones obtained with a reference lamp, demonstrating a promising primary radiation standard.
Vibrational Relaxation Lifetime of a Physisorbed Molecule at a Metal Surface
S. Kumar, H. Jiang, M. Schwarzer, A. Kandratsenka, D. Schwarzer, and A. M. Wodtke, Phys. Rev. Lett. 123, 156101 (2019). DOI: 10.1103/PhysRevLett.123.156101.
Previous measurements of vibrational relaxation lifetimes for molecules adsorbed at metal surfaces yielded values of 1-3 ps; however, only chemisorbed molecules have been studied. We report the first measurements of the vibrational relaxation lifetime of a molecule physisorbed to a metal surface. For CO(υ=1) adsorbed on Au(111) at 35 K the vibrational lifetime of the excited stretching mode is 49±3 ps. The long lifetime seen here is likely to be a general feature of physisorption, which involves weaker electronic coupling between the adsorbate and the solid due to bonding at larger distances.