Del Mar Photonics News

New distribution partner in UK March 20, 2007
Complete Ultrafast Dynamics System March 14, 2007
Business Wire: Del Mar Photonics Announces New Mavericks (TM) Long Wavelength Femtosecond Laser for Scientific Research and Enhanced Biological Imaging. March 13, 2007

Del Mar Photonics is please to announce several new Ti:Sapphire oscillator and amplifier products. Now Del Mar Photonics' customers can choose one of the following oscillator and amplifier options:

Femtosecond Ti:Sapphire Oscillator

1. If you already have a CW pump laser or plan to buy specific model and need only Ti:Sapphire oscillator we can offer our stand alone Ti:Sapphire lasers Trestles, that do not include pump laser and can be customized for any suitable CW pump.

Please indicate required pulse duration (standard models have 20 fs, 50 fs and 100 fs pulses) and tuning range. Let us know what kind of pump laser you have (make/model) so we can confirm what output parameters can be achieved.

2. If you do not have a pump laser and want to buy complete system we can offer you one of the following:
One-box system Trestles Finesse that include Trestles mini Ti:Sapphire oscillator and built in DPSS pump laser

When choosing specific Trestles Finesse model please indicate required CW pump power (4W or 6W), Ti:Sapphire pulse duration and required tuning range (or tuning range, where you want to achieve maximum performance)

Tuning range can be customized at the factory by choosing one of standard or custom made optics set. Typical tuning curves for 4W CW pump laser for two standard optics sets are shown in the Trestles Finesse brochure. For example, with 4W CW pump laser and long-wave mirrors set tuning range can be extended up to 940nm. With 6W CW pump laser tuning range can be extended up to 980nm.

Femtosecond Ti:Sapphire Amplifier


1. We offer integrated oscillator/amplifier system Teahupoo Rider. Teahupoo Rider is a fully-integrated all-in-one-box system that includes Trestles Finesse oscillator or Buccaneer SHG diode-pumped fiber oscillator, pulse stretcher, regenerative amplifier pumped by multi kHz Nd:YAG pump laser and pulse compressor. Teahupoo Rider has a factory preinstalled repetition rate of 2, 5 or 10kHz and ideal for low cost femtosecond micromachining systems, OPA pumping, ultrafast spectroscopy and variety of applications in life sciences.

2. If you already have a Ti:Sapphire oscillator, we can offer you stand alone Ti:Sapphire amplifier. Two standard models are available: Wedge M multipass or Wedge R regenerative. Each amplifier is customized to the customer's amplifier pump laser.

2. Custom Teahupoo Rider systems with a pump laser of your choice are also available. Depending on the required specifications we can recommend a pump laser and make required adjustments for optimum performance.
The following specifications can be achieved:
Repetition rate: single pulses, 10 Hz up to 10kHz
Pulse duration: 100fs, 50fs, 30fs, <30fs
Pulse energy: from 100 mJ per pulse to few mJ per pulse
Tunability: both fixed wavelength and tunable options are available - please indicate required tuning range.

Del Mar Photonics

Del Mar Ventures Scientific Headlines:
On this page we place information about different scientific news important to technologies and products used or developed by Del Mar Ventures.

March 24, 2004

Axicons manufactured by OpticsLand, precision optics division of Del Mar Ventures are used in Steven Chu's group at Stanford University in laser atom cooling and trapping experiments. Steven Chu is a co-winner of the Nobel Prize in Physics (1997), which was awarded for development of methods to cool and trap atoms with laser light.

March 1, 2004 Del Mar MCPs at the WITCH experiment

The WITCH experiment [1] aims to investigate the Standard Model of the electroweak interaction with emphasis on finding new physics beyond the standard model. The primary goal is to search for a contribution of scalar interaction to the vector and axial-vector interaction of the standard model. For this purpose in the WITCH experiment the electron-neutrino angular correlation in beta decay will be determined. This will be achieved by measuring the recoil energy spectrum of the daughter ions after beta decay.

The WITCH experiment is located at the ISOLDE isotope separator facility at CERN [2], which can deliver a wide range of different radioactive isotopes. The isotopes are delivered in an ion beam of 60kV kinetic energy. For the WITCH experiment this ion beam is captured by the REXTRAP setup first. Here the ions are cooled and bunched. Then the ions travel to the WITCH setup in a horizontal beamline. After being bent into a vertical beamline the ions are decelerated to ~2keV kinetic energy. Then the ions get trapped in a first Penning trap. Here they get cooled and are transferred into a second Penning trap where they are stored. During the storage the ions will decay. The decay products are a neutrino, a positron and a daughter ion. The daughter ion will recoil from the trap. The recoil ions, which fly into the subsequent spectrometer, will encounter a retardation potential. Those ions with recoil energies larger than the retardation potential will be reaccelerated behind the retardation barrier and will be focused onto a microchannel plate where they will be counted individually. By varying the retardation potential the recoil energy spectrum will be measured.

 Del Mar MA-24/2 MCPs are used at several places for diagnostic purposes. In the vertical beamline the MCPs are used in conjunction with various collimators for beam tuning, both in the 60keV and the 2keV region of the beam. These MCPs will measure a large amount of ions in a short time (typically 10e5 ions in a couple of microseconds). In order not to destroy the detectors their operating voltage is reduced from the typical voltage of -2kV to approx. -1.3kV. Due to the high count rate per pulse the MCPs will not give individual counts but a current pulse. They are electrically read out and their signal is displayed with a digital storage oscilloscope. For a rough beam tuning this is interpreted by eye. For fine-tuning the signal is read out via the GPIB interface of the oscilloscope and is integrated in a PC. Another Del Mar MCP is used behind the traps. This MCP detector is mounted there temporarily for trapping tests and trap tuning. It detects the stable ions which are first stored and then ejected from the trap. It is operated at a normal voltage of -2kV. In normal operation, when this test detector is absent, another Del Mar MCP will be mounted on a movable arm inside the spectrometer. This detector is intended to scan the wide beam of recoil ions when it passes the plane where the detector is mounted. This will give valuable information on the trajectories of the ions inside the spectrometer. Both the trap test and the spectrometer test MCPs are read out electrically. Their pulses are formed into logical pulses and counted by a scaler.

[1] M. Beck et al., Nucl. Instr. and Meth. A 503 (2003) 567
[2] E. Kugler, Hyperfine Interactions 129 (2000) 23

Recent publications:
M. Beck et al., Nucl. Instr. and Meth. A 503 (2003) 567
M. Beck et al., Nucl. Instr. and Meth. B 204 (2003) 521
A. Lindroth et al., Nucl. Phys. A 721 (2003) 1103c

Prepared by Marcus  Beck

Del Mar Ventures approved a plan to open a state of the art femtosecond research facility in San Diego. New facility will be equipped with a number of femtosecond lasers and optical systems. It will provide research services to the local biotech and chemical research community and will carry out government contracts on advanced femtosecond systems and their applications. Request more info.

1997 Nobel Prize in Physics was awarded for development of methods to cool and trap atoms with laser light. A start has been made on the design of atomic lasers, which may be used in the future to manufacture very small electronic components.
Del Mar Ventures teamed with leading researches in the field of laser atom cooling and trapping and in development and implementation of different elements of atom optics to build custom systems for atomic beams cooling and application in such fields as nanolithography. Full story.

1999 Nobel Prize in Chemistry went to Ahmed Zewail for his work on "Femtochemistry." Many groups in the world work now on applications of femtosecond (ultrafast) spectroscopy in chemistry, biochemistry, biology, pharmacy, new material research, semiconductor physics and optical communications. Opportunities of using Nobel winning method are practically unlimited.

Researches from Department of Chemistry, Wayne State University in Detroit, MI use Femtosecond Optically Gated Fluorescence Kinetic Measurement System FOG100 system to measure excited state dynamics in polymeric dye poly (S-119).
Organic macromolecular materials have potential applications in nonlinear optics, optical switching, photorefractive effects, optical limiters and light emitting diodes. The applications of azo-benzene containing polymers in optical data storage are closely associated with a fast isomerization process. First report of ultra-fast fluorescence measurements aimed at clarifying the character of isomerization process in azochromophores was published recently:
"Femtosecond fluorescence dynamics and molecular interactions in a water-soluble nonlinear optical polymeric dye."
O.Varnavski, T.Goodson III, Chemical Physics Letters 13840 (2000)

By using time-resolved luminescence spectroscopy based on up-conversion gating technique (FOG100), researchers from Institute of Materials Chemistry Tampere University of Technology, Finland study novel molecular electron donor-acceptor (DA) dyads, composed of a phytochlorin donor and a [60]fullerene acceptor.
"Since the initial discovery of C₆₀ or [60]fullerene and the development of a method for its preparation, the fullerenes have been used in the design of electron donor-acceptor (DA) molecular systems. DA dyads are used as a model systems in studies of a) photoinduced generation and transport of charge (CT), b) generation and migration of electronic energy. Dyads, composed of a phytochlorin donor and a [60]fullerene acceptor are used for modeling of the primary reactions of the natural chlorophyll containing photo-synthetic centers."

1997 Nobel Prize in Physics was awarded for development of methods to cool and trap atoms with laser light. A start has been made on the design of atomic lasers, which may be used in the future to manufacture very small electronic components.
Del Mar Ventures teamed with leading researches in the field of laser atom cooling and trapping and in development and implementation of different elements of atom optics to build custom systems for atomic beams cooling and application in such fields as nanolithography, nanostructured materials and atom optics.

Microchannel plates from Del Mar Ventures are used in position-sensitive detectors for research of Femtochemistry of free clusters at MBI-Institute, Berlin (W. Radloff, C.P.Schulz)
"The aim of this project is to elucidate ultrafast photophysical and photochemical processes in free molecules and molecular clusters excited by femtosecond laser pulses in a broad spectral range. The long term goal is a detailed understanding of the dynamics of making and breaking of bonds initiated by light as well as the control of such processes.
Broad experience has been gained studying different molecular cluster systems applying novel methods such as the femtosecond time-resolved photoelectron spectroscopy."

Researches from FOM - Institute for Atomic and Molecular Physics (AMOLF), Amsterdam, Netherlands
Group of ATMOSPHERIC PHOTO PHYSICS (APP) (Prof. Dr. W.J. van der Zande) use MCPs for position and time sensitive detector and for imaging techniques.
"In view of its strong tradition in molecular physics AMOLF is very well positioned to perform in depth studies of poorly explored molecular processes with likely importance for the understanding of the earth upper atmosphere. Our atmosphere is a complex reaction vessel in which photodissociation, collisions between electrons and molecular ions, and reactions involving long-lived metastable species and radicals play important roles. Our aim is to develop experimental techniques and analytical tools to quantify and to identify the underlying microscopic processes on a quantum-state resolved level. We concentrate on photodissociation processes of atmospheric molecules in the UV and VUV and on electron-molecular ion collisions. The experimental techniques involve picosecond time-resolved experiments, novel coincident multi-particle detection schemes and coincident detection of electron-ion pairs in ionization studies."

New type of open microchannel plate detector have been introduced recently by Del Mar Ventures MCP Detectors laboratory. Open Image Intensifiers and Detectors with Metal Anode are assembled in a rugged metal-ceramic housing. Researches from Chemical Dynamics Lab. at the University of Adelaide plan to use them to study Gas Phase Organometallic Reactions.

Using curved MCPs in reflectron time of flight mass spectrometers provide better mass resolution. Dr.T.Bergmann from Murnau, Germany, invented a detector for time-of-flight mass-spectrometer with low timing errors and simultaneously large aperture. His invention was patented US Patent 5,637,869 and realized in ALBATROS ESI-TOF system using curved microchannel plates developed and produced by Del Mar Ventures.
ALBATROS ESI-TOF system has the world record mass-resolution and can be used in sophisticated biochemical and biomedical research.
Same curved MCPs were used by Cluster Group at MPI Stuttgart in there mass spectrometer apparatus to study "the properties of tiny clusters containing from a few to several thousands of atoms or molecules. The size dependence of some of these properties allows one to determine the geometric or electronic structure of the clusters. In this way, the evolution of the cluster properties towards those of bulk matter can be followed on an atom-by-atom basis. The field is quite new and interdisciplinary. It attracts atomic, molecular, solid state, and even nuclear chemists and physicists."

"The sole aim of science is the glory of the human spirit."   - Gerhard Herzberg, Nobel Laureate in Chemistry

"In science there is only physics; all the rest is stamp collecting." -  Ernest Rutherford

NOTICE FOR WEB PAGES
"This Website does not constitute an offer of securities for sale in the United States, and the securities mentioned herein may not be offered or sold in the United States absent registration or an exemption from registration, and any public offering of securities to be made in the United States must be made by means of a prospectus that contains detailed information of the Company and management, as well as financial statements. This Website also does not constitute an offer to sell or a solicitation of an offer to purchase any of the securities mentioned herein in the United States of America or in any other jurisdiction in which such offer or solicitation is not authorized or to any person to whom it is unlawful to make such offer or solicitation. Users of this Website are requested to inform themselves about and to observe any such restrictions."

Copyright © 2007 [Del Mar Ventures]. All rights reserved.