Del Mar Photonics Newsletter Summer, 2008
Product news and updates - Training Workshops - Featured Customers - Spring Events
| Seed oscillator for Ti:Sapphire amplifier
Del Mar Photonics femtosecond Ti:Sapphire lasers are available with 100 fs, 50 fs and 20 fs pulse durations as pre-assembled kits, as well as one-box oscillators integrated with DPSS pump lasers Trestles Finesse, and also a stand alone Ti:Sapphire oscillator with any suitable pump laser.
Reserve now a spot in our Ti:Sapphire training workshop on femtosecond and CW lasers in San Diego, California during this summer.
|New laser spectrometer OB' for research that
demands high resolution and high spectral
density in UV-VIS-NIR spectral domains
The OB' laser spectrometer 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. First customer who purchased OB' laser spectrometer is Mr. Christophe Couteau, Photonic Entanglement Group (PEG) led by Professor Gregor Weihs, Institute for Quantum Computing (IQC). The IQC is a part of the University of Waterloo in Ontario, Canada.
Reserve a spot in our
CW lasers training workshop in San Diego, California
during this summer.
|Femtosecond Transient Absorption Measurements system
Future nanostructures and biological nanosystems will take advantage not only of the small dimensions of the objects but of the specific way of interaction between nano-objects. The interactions of building blocks within these nanosystems will be studied and optimized on the femtosecond time scale - says Sergey Egorov, President and CEO of Del Mar Photonics, Inc. Thus we put a lot of our efforts and resources into the development of new Ultrafast Dynamics Tools such as our Femtosecond Transient Absorption Measurements system Hatteras. Whether you want to create a new photovoltaic system that will efficiently convert photon energy in charge separation, or build a molecular complex that will dump photon energy into local heat to kill cancer cells, or create a new fluorescent probe for FRET microscopy, understanding of internal dynamics on femtosecond time scale is utterly important and requires advanced measurement techniques.
spot in our Ultrafast Dynamics Tools
training workshop in San Diego, California.
|Rincon cross-correlator shipped to the University of
How good is the output from your femtosecond laser? The new third-order cross-correlator Rincon was specifically developed for measuring a wide array
of output parameters from ultrafast laser systems including: contrast ratio of laser pulses, determining pulse pedestal, pre- and post-pulses, and amplified spontaneous emission in femtosecond systems. It also provides information about the third-order cross-correlation function of pulse intensity on a femtosecond scale and can be used for alignment of high power femtosecond lasers. A portion of the input pulse is converted to the second harmonic (SH) with a nonlinear crystal. A dichroic mirror reflects the SH and transmits the fundamental thus splitting the beam into the two arms of the crosscorrelator. The fundamental beam arm includes a retro reflector and delay-line. After passing through the delay-line the fundamental is recombined with the SH and focused into a DKDP or BBO crystal (depending on the input pulse wavelength). Mixing the fundamental and SH pulses in the nonlinear crystal produces non-collinear third harmonic generation (TH). By filtering out the fundamental and SH frequencies, the TH can be isolated. Measuring the TH signal as a function of the optical delay between the fundamental and SH pulses gives the third order cross correlation function. The third order cross-correlator is ideal for looking at the full range of output from amplified femtosecond laser systems. High temporal resolution over a long (close to 1 ns) window shows pulse features that are usually missed, giving the user a detailed and complete picture of the quality and stability of the output pulse parameters of their femtosecond laser system. more
|LiNbO3 OPA - Temple
iPCA - interdigital Photoconductive Antenna for terahertz waves
Large area broadband antenna with lens array and high emitter conversion efficiency
iPCA with LT-GaAs absorber, microlens array for laser excitation wavelengths l £ 850 nm, adjusted hyperhemispherical silicon lens with a high power conversion efficiency of 0.2 mW THz power / W optical power. The iPCA can be used also as large area THz detector. The two types iPCAp and iPCAs have the same active interdigital antenna area but different contact pad directions with respect to the electrical THz field.
Interdigital Photoconductive Antenna for terahertz waves generation using femtosecond Ti:Sapphire laser
Del Mar Photonics supplies a wide range of continuous-wave diode pumped solid state lasers (CW DPSS). Each laser sold, includes a rugged power supply integrated with the controller unit. Applications include Ti:sapphire pumping (both femtosecond and CW), medium and low power DPPS lasers for Raman spectroscopy, optical tweezers, laser Doppler anemometry, particle-image velocimetry (PIV), non-destructive testing, inspection and alignment.
High power DPSS CW lasers delivering up to 6 Watts CW at 532nm is an ideal for affordable optical pumping of Ti:Sapphire.
fs TiSa laser
Del Mar Photonics, Inc. has recently established a new partnership to provide opto-mechanical design and analysis services that will help you to develop an innovative and efficient solution for your optical system. With our extensive expertise in opto-mechanical design, precision positioning mechanisms, thermal/structural analysis, drafting, assembly/integration, and product testing we can progress your design from an optical prescription to a complete drawing package and delivered hardware. Our team is experienced in engineering design and analysis of all type of solid state and fiber lasers, imaging and spectroscopy systems, airborne optical reconnaissance packages, ground based and space based telescopes, IR optical Dewars, Alt over Az gimbal mounts, various sensor systems, and more. Contact us today to discuss your performance requirements and specifications of your application.
|Attend one of our training workshops in San Diego, California
during this summer
Del Mar Photonics has presented training workshops for customers and potential customers in the past 2 years.
Our workshops cover scientific basics, technical details and provide generous time for hands-on training.
Each workshop is a three-day seminar conducted by professional lecturer from 10am to 4pm. It includes lunch, as well as a training materials. We have also reserved two days for Q&A sessions, one-on-one system integration discussions, social networking, and San Diego sightseeing.
The following training workshops will be offered during this
|Delmar Larsen Lab is
new laboratory located in the chemistry department of the UC
Lab's research spreads across many scientific disciplines including biophysics, physical chemistry, molecular biology and computational modeling. Del Mar Photonics' Pismo Pulse picker proved to be a valuable tool in the lab for investigation and characterization of rapid condensed phase dynamics. The results of their new research was presented recently at the American Chemical Society April meeting in New Orleans, LA
Presentation titled Resolving the excited and ground state reaction coordinates in the green fluorescence protein and mutants with dispersed pump-dump probe spectroscopy deals with the characterization of the excited- and ground-state photodynamics of wild-type (wt), S65T/H148D and S65T/H148E mutants of the Green Fluorescent Protein (GFP) system with femtosecond time-resolved dispersed multi-channel pump-dump-probe measurements. Presentation titled Effect of morphology in KNb6O17 nanosheets and nanoscrolls on photocatalytic H2 evolution from water discusses the properties of layered K4Nb6O17 - a known catalyst for water molecules dissociation under UV light.
Reserve a spot in our Ultrafast Dynamics Tools training workshop in San Diego, California during this summer
Inactivation of viruses with a femtosecond laser via impulsive stimulated Raman scattering
Prof. Kong-Thon Tsen from Arizona State University uses Del Mar Photonics femtosecond laser Trestles 50 in his research on laser inactivation of viruses. His work was presented recently at Photonics West 2008 conference in San Jose, CA.
BACKGROUND: Resonant microwave absorption has been proposed in the literature to excite the vibrational states of microorganisms in an attempt to destroy them. But it is extremely difficult to transfer microwave excitation energy to the vibrational energy of microorganisms due to severe absorption of water in this spectral range. We demonstrate for the first time that, by using a visible femtosecond laser, it is effective to inactivate viruses such as bacteriophage M13 through impulsive stimulated Raman scattering. RESULTS AND DISCUSSION: By using a very low power (as low as 0.5 nj/pulse) visible femtosecond laser having a wavelength of 425 nm and a pulse width of 100 fs, we show that M13 phages were inactivated when the laser power density was greater than or equal to 50 MW/cm2. The inactivation of M13 phages was determined by plaque counts and had been found to depend on the pulse width as well as power density of the excitation laser. CONCLUSION: Our experimental findings lay down the foundation for an innovative new strategy of using a very low power visible femtosecond laser to selectively inactivate viruses and other microorganisms while leaving sensitive materials unharmed by manipulating and controlling with the femtosecond laser system.
Reserve a spot in our femtosecond Ti:Sapphire training workshop during this summer in San Diego, California
Absolute Distance Measurements Using the Optical Comb of a Femtosecond Pulse Laser Trestles
Del Mar Photonics customer Seung-Woo Kim recently published an article in the International Journal of Precision Engineering and Manufacturing (Vol. 8, No.4, pp.22-26, 22 Oct. 2007) about the research at KAIST, South Korea, in which he describes a new way of implementing absolute displacement measurements by exploiting the optical comb of a femtosecond pulse laser (Trestles 50) as a wavelength ruler. Their results demonstrate a successful industrial application of an optical frequency synthesis employing a femtosecond laser (Trestles 50), a technique that offers many possibilities for performing precision length metrology that is traceable to the well-defined international definition of time. more
Reserve a spot in our femtosecond Ti:Sapphire training workshop in San Diego, California during this summer
Manufacturing challenging optical components for infrared applications
Del Mar Photonics online store features windows, prisms, lenses, attenuators, etalons, crystals and wafers, and other items. Axicons, barium fluoride windows, germanium etalons, rutile (TiO2) prisms, microchannel plates and detectors, saturable absorber mirrors, photoconductive THz antennas, lithium niobate wafers and crystals and many other high quality affordable components for scientific research and OEM production are delivered globally from our stock.
|Del Mar Photonics events
Del Mar Photonics supports the Graduate Research Seminar on Molecular Energy Transfer.
The Graduate Research Seminar on Molecular Energy Transfer is scheduled to
take place January 17–18, 2009, at the Four Points Sheraton/Holiday Inn Express
hotel, Ventura, California, USA, immediately preceding the Gordon Research
Conference on the same topic. This two-day format is designed specifically to
establish connections among the young conferees and promote their full
participation in the main part of the Gordon Conference.
2008 FISFES Workshop
Del Mar Photonics Newsletter Spring 2008
Del Mar Photonics one year ago: Newsletter from Spring 2007