The Center for Photochemical Sciences Bowling Green State University, Bowling
Green, Ohio, USA offers a Graduate Student Position
A Graduate Student position involving ultrafast time-resolved spectroscopic
studies of photochemistry and photoinduced dynamics of small polyatomic
molecules in the liquid-phase is available immediately in the laboratory of
Alexander N. Tarnovsky at BGSU.
The objective is to trace the electronic and vibrational reorganization,
following the excited state evolution, including the characterization of conical
intersections, and to develop an entry point for quantum control of femtosecond
processes in solution.
In our research, we use state-of-the-art experimental methods of ultrafast laser
spectroscopy, primarily the deep-UV-through-near-IR pump/probe method with 40 fs
time resolution (1 fs = 10-15 s). Other techniques include laser pump/x-ray
absorption probe and femtosecond stimulated Raman.
The computational characterization of conical intersections is handled though
intradepartmental collaboration (Prof. Massimo Olivucci).
Requirements:
- bachelor's degree in chemistry or a related major from an accredited college
or university Preference will be given to candidates with solid background in
physical chemistry/chemical physics. Experience in reaction dynamics and/or
laser spectroscopy is a plus. For further information about the PhD program at
BGSU, see
http://www.bgsu.edu/departments/photochem/phd_program/overview_phd.html
The application should include cover letter, CV, and list of courses taken in
physical/theoretical/chemistry. Please arrange for two letters of recommendation
to follow up your application.
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Near Field Scanning Optical Microscope
NSOM Godwit - best spatial optical resolution using the near field scanning optical microscope
(NSOM) principle
Near field scanning optical microscope (NSOM) and atomic force microscope (AFM)
modes of operation
NSOM images with laser and lamp illumination
Commerciaand custom NSOM probes
Near field optica and luminescence images in photon counting mode
NSOM images in collection and illumination modes
Transmission and reflection NSOM configurations
20 nm optical resolution (Raleigh criteria for spatial resolution)
State-of-the-art optical microscope console: simultaneous sample and tip
observation with long working distance objectives
Femtosecond and UV excitation
True single molecule detection
High-resolution AFM imaging of DNA
Godwit-uScope data acquisition and Godwit-FemtoScan image processing software
Ambient light protection with light-tight box
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Trestles LH Ti:Sapphire
laser
Trestles LH is a new series of high quality femtosecond Ti:Sapphire
lasers for applications in scientific research, biological imaging, life
sciences and precision material processing. Trestles LH includes integrated
sealed, turn-key, cost-effective, diode-pumped
solid-state (DPSS). Trestles LH lasers offer the most attractive pricing
on the market combined with excellent performance and reliability. DPSS LH
is a state-of-the-art laser designed for today’s applications. It combines
superb performance and tremendous value for today’s market and has
numerous advantages over all other DPSS lasers suitable for Ti:Sapphire
pumping. Trestles LH can be customized to fit customer requirements and
budget.
Trestles LH plus OPO
(Optical Parametric Oscillator)
Reserve a
spot in our Femtosecond lasers training
workshop in San Diego, California. Come to learn how to build a
femtosecond laser from a kit
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DPSS DMPLH lasers
DPSS DMP LH series lasers will pump your Ti:Sapphire laser.
There are LH series lasers installed all over the world pumping all makes & models
of oscillator. Anywhere from CEP-stabilized femtosecond Ti:Sapphire oscillators
to ultra-narrow-linewidth CW Ti:Sapphire oscillators. With up to 10 Watts CW
average power at 532nm in a TEMoo spatial mode, LH series
lasers has quickly proven itself
as the perfect DPSS pump laser for all types of Ti:Sapphire or dye laser.
Ideal for pumping of:
Trestles LH
Ti:Sapphire laser -
ULN ultra low-noise option
T&D-scan laser
spectrometer based on narrow line CW Ti:Sapphire laser
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Pismo pulse picker
The Pismo pulse picker systems is as a pulse gating system that lets single
pulses or group of subsequent pulses from a femtosecond or picosecond pulse
train pass through the system, and stops other radiation. The system is
perfectly suitable for most commercial femtosecond oscillators and
amplifiers.
The system can pick either single pulses, shoot bursts (patterns of single
pulses) or pick group of subsequent pulses (wider square-shaped HV pulse
modification). HV pulse duration (i.e. gate open time) is 10 ns in the default
Pismo 8/1 model, but can be customized from 3 to 1250 ns upon request or made
variable. The frequency of the picked pulses starts with single shot to 1 kHz
for the basic model, and goes up to 100 kHz for the most advanced one.
The Pockels cell is supplied with a control unit that is capable of synching
to the optical pulse train via a built-in photodetector unit, while electric
trigger signal is also accepted. Two additional delay channels are available
for synching of other equipment to the pulse picker operation. Moreover, USB
connectivity and LabView-compatible drivers save a great deal of your time
on storing and recalling presets, and setting up some automated experimental
setups. One control unit is capable of driving of up to 3 Pockels cells, and
this comes handy in complex setups or contrast-improving schemes. The system
can also be modified to supply two HV pulses to one Pockels cell unit,
making it a 2-channel pulse picker system. This may be essential for
injection/ejection purposes when building a regenerative or multipass
amplifier system.
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Tourmaline Yb-SS-1058/100 Femtosecond solid state laser system
The Yb-doped Tourmaline Yb-SS laser radiates at 1058±2 nm
with more than 1 W of average power, and enables the user to enjoy
Ti:Sapphire level power at over-micron wavelengths. This new design from Del
Mar's engineers features an integrated pump diode module for greater system
stability and turn-key operation. The solid bulk body of the laser ensures
maximum rigidity, while self-starting design provides for easy
"plug-and-play" operation.
Laser for second harmonic imaging in the retina
with the voltage sensitive dye FM4-64
New fiber optics and fiber laser products
Laser Source for Photodynamic Therapy -
request additional information and quote
AOM OEM Acousto-Optic Modulators for DPSS lasers, 1060 – 2100 nm -
request additional information and quote
AOM – pigtailed for pulsed fiber lasers, 1060-2100 nm -
request additional information and quote
Quasi-CW Yb fiber laser, 36 W in CW, 17 W pulsed -
request additional information and quote
Pulsed (AOM) fiber laser, 20 W, 1060 – 2100 nm -
request additional information and quote
Pulsed (pulse width/repetition rate – tunable) MOFA-type laser 10-W, 1060 nm
-
request additional information and quote
Eye-safe CW fiber laser, 25 W -
request additional information and quote
Yellow fiber Laser, 15 W -
request additional information and quote
10-GHz photonic link -
request additional information and quote
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780 nm and 1560 nm Femtosecond Fiber Laser
Buccaneer SHG
160/80 -
Buccaneer SHG 300/120
Femtosecond Fiber Laser with SH Generation
Wavelength (switchable): 780±5 nm (fixed) or 1560±10 nm (fixed)
Pulse Width (FWHM): <120 fs
Power output (switchable apertures):
>80 mW, 780 nm, TEM00, linearly polarized or
>160 mW, 1560 nm, TEM00, linearly polarized
Repetition rate: 70 MHz
Spatial mode: TEMoo
RF SYNC out: SMA connector (200-300 mV@50 ohm load)
Mode lock status: SMA connector (3.5/0 V) and LED
For applications in Amplifier systems seeding, Terahertz generation and
detection, Multi-photon microscopy, Ultrafast spectroscopy, Semiconductor device
characterization, Supercontinuum generation, Optical coherence tomography,
Telecommunications , Micromachining, Nonlinear Bioimaging (SHG imaging), THz
spectroscopy, Education
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New laser spectrometer
T&D-scan for research that
demands high resolution and high spectral
density in UV-VIS-NIR spectral domains - now available with
new pump option!
The
T&D-scan
includes
a CW ultra-wide-tunable narrow-line laser, high-precision wavelength meter,
an electronic control unit driven through USB interface as well as a
software package. Novel advanced design of the fundamental laser component
implements efficient intra-cavity frequency doubling as well as provides a
state-of-the-art combined ultra-wide-tunable Ti:Sapphire & Dye laser
capable of covering together a
super-broad spectral range between 275 and 1100 nm. Wavelength
selection components as well as the position of the non-linear crystal are
precisely tuned by a closed-loop control
system, which incorporates highly accurate wavelength meter.Reserve a
spot in our CW lasers training
workshop in San Diego, California. Come to
learn how to build a
CW
Ti:Sapphire laser from a kit
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Femtosecond fiber laser Model Pearl-70P300
-
request a quote
Femtosecond pulsed lasers are used in many fields of physics, biology,
medicine and many other natural sciences and applications: material processing,
multiphoton microscopy, «pump-probe» spectroscopy, parametric generation and
optical frequency metrology. Femtosecond fiber lasers offer stable and steady
operation without constant realignment.
The Pearl-70P300 laser comprises: a passively mode-locked fiber laser, providing
pulses with repetition rate 60 MHz and having duration of 250-5000 fs, an
amplifier based on Er3+ doped fiber waveguide with pumping by two laser diodes,
a prism compressor for amplified pulse compression.
Pearl Ultra-Compact
Ultrafast Picosecond Fiber
Oscillator
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Reef femtosecond autocorrelators
The autocorrelation technique is the most common method used to determine
laser pulse width characteristics on a femtosecond time scale.
The basic optical configuration of the autocorrelator is similar to that of an
interferometer (Figure.1). An incoming pulse train is split into two beams of
equal intensity. An adjustable optical delay is inserted into one of the arms.
The two beams are then recombined within a nonlinear material (semiconductor)
for two photon absorption (TPA). The incident pulses directly generate a
nonlinear TPA photocurrent in the semiconductor, and the detection of this
photocurrent as a function of interferometer optical delay between the
interacting pulses yields the pulse autocorrelation function. The TPA process is
polarization-independent and non-phasematched, simplifying
alignment.
Reef-RT autocorrelator measures laser
pulse durations ranging from 20 femtoseconds to picosecond regime. It measures
pulse widths from both low energy, high repetition rate oscillators and high
energy, low repetition rate amplifiers. Compact control unit operates
autocorrelator head and optional spectrometer through on-screen menus.
Autocorrelation trace and spectrum can be displayed and analyzed on screen or
downloaded to remote computer.
New:
Reef-20DDR autocorrelator
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Multishot-FROG for femtosecond fiber laser oscillator and amplifier
Collinear (interferometric) autocorrelation
for 1300-2000 nm wavelength range |
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Trestles Fourth Harmonic Generator -
request a quote
Trestles FHG is designed to work with
Ti:sapphire lasers, such as the Trestles Ti:sapphire laser to provide fourth
harmonic generation. Trestles FHG is an affordable and easy solution to
generating pulses around 200 nm.
Trestles FHG is available in two versions. The first version uses the third
harmonic mixed with the fundamental wavelength to produce fourth harmonic
generation. This option provides the fundamental, as well as the second, third
and fourth harmonics. For input of 810 nm, 1 W, 82MHz and 50 fs, output of the
fourth harmonic is at 203 nm, 300-400 fs and power is 3 mW. The second option
uses two separate second harmonic generation stages to produce fourth harmonic
generation. With input of 810 nm, 1 W, 82 MHz and 50 fs, output of the fourth
harmonic is at 210 nm, pulse width of 500 fs and power of 10 mW.
The Trestles FHG from Del Mar Photonics is an easily installed solution for
adding functionality to any femtosecond laser system. Extended ranges will
increase capabilities for research, and specific applications such as microscopy
and spectroscopy.
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Near IR viewers
High performance infrared
monocular viewers are designed to observe radiation emitted by
infrared sources. They can be used to observe indirect radiation of IR
LED's and diode lasers, Nd:YAG, Ti:Sapphire, Cr:Forsterite, dye lasers and
other laser sources. IR viewers are ideal for applications involving the
alignment of infrared laser beams and of optical components in
near-infrared systems. Near IR viewers
sensitive to laser radiation up to 2000 nm.
The light weight, compact monocular may be used as a hand-held or facemask
mounted for hands free operation.
Ultraviolet viewers are
designed to observe radiation emitted by UV sources. |
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Hummingbird EMCCD camera
The digital Hummingbird
EMCCD camera combines high sensitivity, speed and high resolution.
It uses Texas Instruments' 1MegaPixel Frame Transfer Impactron device which
provides QE up to 65%.
Hummingbird comes with a standard CameraLink output.
It is the smallest and most rugged 1MP EMCCD camera in the world.
It is ideally suited for any low imaging application such as hyperspectral
imaging, X-ray imaging, Astronomy and low light surveillance.
It is small, lightweight, low power and is therefore the ideal camera for
OEM and integrators.
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