Vacuum viewport for Quantum Cascade Lasers sales@dmphotonics.com
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- Germanium etalon, diam 1.25" x 3"[E-Ge-1.25-3] http://greyhawkoptics.com/product_info.php?cPath=1_28&products_id=86&osCsid=e686d298fbee0014ef0005e84082e5ccMaterial Ge optical gradeDiameter 1.5 inches Tolerance +/-0.05 inchLength 3 inches Tolerance +/-0.01 inchSurface quality 80/50 S/DFlatness lambda/4Clear aperture >90 % of diameterParallelism < 10 arc secCoating noneDel Mar Photonics offer variety of standard as well as custom germanium etalons.http://www.sciner.com/Opticsland/Germanium_Fabry_Perot_Etalon.htmGermanium Fabry Perot Etalon sales@dmphotonics.com Germanium Fabry Perot Etalon sales@dmphotonics.comQuantum Cascade Lasers CalibrationMy application is calibrate the relative wavelength of tunable quantum cascade lasers in the mid-infrared (~10 microns). The laser itself is used for remote sensing of atmospheric gases.FSR (Free Spectral Range) is determined by etalon length L and wavelength of operation lambdaFSR= (lambda^2) / (2*n*L)The most popular standard etalon is 1 inch longFor longer wavelength (> 10 micron) it's often necessary to use etalons 2-3 inches long to get required accuracy of calibration.Del Mar Photonics offer variety of standard as well as custom germanium etalons.http://www.dmphotonics.com/Ge_etalon.htmUsing Ge etalon in gas sensing project involving quantum cascade lasersJagadeeshwari (Esha) Manne, PhD student, University of AlbertaProject: Infrared absorption spectroscopy with Quantum cascade laser.The advance of Quantum cascade (QC) lasers fabricated by band structure engineering offers an attractive new option for IR absorption spectroscopy. QC-DFB lasers are of particular interest to gas-sensing applications because they emit single frequency radiation which falls within the 3-15 um window, where the fundamental absorption bands of most of the molecules are located. http://www.dmphotonics.com/DelMarPhotonics_News.htmGermanium etalon Part number: Ge_CPE_2.00_0.50 - request a quoteCommon specificationsType: Cylindrical plane etalonMaterial: Ge optical gradeDiameter: 0.50 (+/-0.05) inchLength: 2.00 (+/-0.01) inchFlatness: 1/4 lambda flat each end, HeNeParallelism: < 3 arc seconds or betterlength measure to 0.0005"Small bevelsSurface quality F-f(80/50) per MIL-F-48616Bevels: Protective Bevelhttp://www.dmphotonics.com/Germanium_etalon_110518/Germanium_etalon.htmGermanium Etalons for trace gas analysis sales@dmphotonics.comGermanium Etalons for trace gas analysis sales@dmphotonics.comGermanium vacuum viewport sales@dmphotonics.com Germanium vacuum viewport sales@dmphotonics.comA New Quantum-Cascade Laser Based Spectrometer for High-Precision Airborne CO2 MeasurementsRodrigo Jimenez et al. Harvard University – Department of Earth and Planetary SciencesWe present a new, compact, fast response mid-IR laser spectrometer for high-precision airborne measurements of CO2. The instrument is based on a thermoelectric-cooled, pulsed-operated DFB quantum-cascade (QC) laser. Unlike conventional cryogenically-cooled Pb-salt diode lasers, QC lasers display high mode purity and wavelength stability, and can be operated at near room temperature. This last attribute allows for a compact design and simplified operation.The CO2 concentration is derived from direct absorption dual-cell spectra obtained by electrical modulation at ~5-10 kHz of the laser wavelength across a selected ?3-band transition at around 4.3 ?m (typically 2311 or 2314 cm-1). The measurements are thus fully specific of the CO2 molecule and free from interference of H2O or other mid-IR light absorbers. Sample gas humidity is nevertheless reduced to less than ~100 ppmv in order to restrain density variation effects.Absorption spectra of the sample and a flowing standard (reference) along a 10-cm (or 5-cm) path are simultaneously detected by LN2-cooled InSbdetectors. The CO2 concentration difference is retrieved from the differential spectrum (sample/reference). The advantages of this “null” modeoperation are discussed in detail.The spectrometer includes a mechanism that allows directing the sample beam either to the cell or to a 25-mm Ge etalon for accurate wavelength tuning rate determination. Additional technical details are discussed, including the impact of laser linewidth on the linearity of the measurements.The spectrometer is enclosed in a temperature controlled, hermetically sealed vessel. The enclosure is flushed with CO2-free dry air previous operation in order to avoid light absorption in the external path. Details on the gas temperature, pressure, and flow rate controls are also presented.The demonstrated short-term precision of the instrument is better than ~75 ppbv Hz-1/2 (1-sigma in 1-s integration time) for CO2 concentrations within ±100 ppmv of the reference concentration. An accuracy of ±0.2 ppmv or better is insured through periodic calibration with high, low and “archival”http://www.dmphotonics.com/Germanium-Optics/Quantum-Cascade%20Laser%20Based%20Spectrometer%20CO2.htm
- Germanium etalon, o 12.7 mm x 50.8 mm (o 0.5" x 2")[E-Ge-12.7-50.8] http://greyhawkoptics.com/product_info.php?cPath=1_28&products_id=930&osCsid=c9c9c5f10e8d422785c74cf9db7cbea9Ge_ET_0.5_2Material: Ge optical gradeDiameter: 0.50 (+/-0.05) inchLength: 2.00 (+/-0.01) inchFlatness: 1/4 lambda flat each end, HeNeParallelism: <= 5 arc seconds or betterlength measure to 0.0005"Small bevelsSurface quality 80/50Bevels: Protective BevelGermanium windows - new item sales@dmphotonics.comMaterial: Germanium optical gradeType: rectangular plano-plano windowDimensions: 45 x 48 mm (+/-0.1 mm)Thickness: 2 mm (+/-0.1 mm)Surface quality: 60/40 scr/digSurface accuracy: better 3 fringesParallelism: < 5 arc minClear aperture: > 90% of diameterCoating: AR/DLC at 8-12 micronsPart number: Ge_RPW_45_48_2_AR_DLC_8-12Germanium window, diam 25.4 mm x 3.0 mmGe optical gradeType: circular plane windowDiameter: 25.4 mm (+0.0/-0.2 mm)Thickness: 3 mm (+/-0.1 mm)Surface quality: 40/20 scr/digParallelism: 3 arc minutesClear aperture: 90% of diameterhttp://www.delmarphotonics.com/Germanium-Optics/Germanium-window-diameter-25_4.htmWe have 3 options which are on the shelf and each has the 8-12 micron AR coating on them.GE-W-25-2-AR812 (25.4 mm dia x 2 mm thick) in stock - request a quote sales@dmphotonics.comGE-W-38-3-AR812 (38.1 mm dia x 3 mm thick) in stock - request a quote sales@dmphotonics.comGE-W-50-3-AR812 (50.8 mm dia x 3 mm thick) in stock - request a quote sales@dmphotonics.comhttp://www.dmphotonics.com/Germanium_windows_ARC8-12micron/Germanium%20windows%20with%208-12%20micron%20AR%20coating.htmGermanium opticshttp://greyhawkoptics.com/index.php?cPath=1_28&osCsid=e686d298fbee0014ef0005e84082e5cc
- Sapphire Vacuum viewport http://www.dmphotonics.com/Zinc-selenide-ZnSe-vacuum-viewport/vacuum-viewports-ZnSe.htmDel Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance.When you send us your inquiry please fill out the following form to indicate all important specifications and e-mail it to us with your inquiry.Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control.Windows Materials include:Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, PyrexUHV Sapphire viewportshttp://www.dmphotonics.com/Sapphire_Viewports/UHV%20Sapphire%20viewports.htmVacuum viewport Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance. Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control. Windows Materials include: Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, Pyrex. Standard Viewing diameters from .55" to 1.94 ".Coating - a range of custom coatings can applied - which include- Single QWOT- Broad Band AR- V coatings- ITO- DLC (Diamond like coating)UHV Sapphire viewports4.5 inch – CF: Transmission UHV View-portsType of viewport: Zero LengthTransmission wavelengths range (Visible and Infrared): 0.4 micron to 5.0 micronAnti Reflection Coating for the Infrared Wavelength Range (both side of the window material): 2.0 micron to 5.0 micronType of anti reflection coating: BBAR (BroadBand Anti Reflection) coatingTransmittance:? 95% FOR 2.0 to 5.0 micron wavelength range.Standard Flange Dimension 4.5 inch FC (Conflat Flange)Flange Outer Diameter:114 mm ± 0.5 mmClear Viewing Diameter/TransmissionAperture: ? 60 mmWindow material: Sapphire (window material should be Sapphire only since it can go up to 200°C)Window material is NON Hygroscopic (withstand in humid environment)Compatible to Vacuum Range (UHV):10-8 TorrBaking Temperature: ? 150°CVacuum Seal Type: Vacuum seal type is compatible to above temperature range and pressure rangeWindow material mounted on (CF-Flange material): Stainless Steel-304L (Non magnetic)Part number: Sa_UHV_viewport_CF4.5”_2_5 - request a quote sales@dmphotonics.comhttp://www.dmphotonics.com/Sapphire_Viewports/UHV%20Sapphire%20viewports.htmUHV Sapphire viewports6 inch – CF: Transmission UHV View-portsType of viewport: Zero LengthTransmission wavelengths range (Visible and Infrared): 0.4 micron to 5.0 micronAnti Reflection Coating for the Infrared Wavelength Range (both side of the window material): 2.0 micron to 5.0 micronType of anti reflection coating:BBAR (Broad Band Anti Reflection) coatingTransmittance:? 95% FOR 2.0 to 5.0 micron wavelength range.Standard Flange Dimension 6 inch FC (Conflat Flange)Flange Outer Diameter:152 mm ± 0.5 mmClear Viewing Diameter/TransmissionAperture: ? 80 mmWindow material: Sapphire (window material should be Sapphire only since it can go up to 200°C)Window material is NON Hygroscopic (withstand in humid environment)Compatible to Vacuum Range (UHV):10-8TorrBaking Temperature: ? 150°CVacuum Seal Type:Vacuum seal type is compatible to above temperature range and pressure range(Mechanical/Brazed/Bonding etc.)Window material mounted on (CF-Flange material): Stainless Steel-304L (Non magnetic)Part number: Sa_UHV_viewport_CF6”_2_5 - request a quote sales@dmphotonics.comhttp://www.dmphotonics.com/Sapphire_Viewports/UHV%20Sapphire%20viewports.htm
- Silicon viewports for Terahertz (THz) radiationhttp://www.dmphotonics.com/Viewport/Silicon%20viewports%20for%20Terahertz%20(THz)%20radiation.htmSample specs:Si_CF63_viewport_60_4 - request a quote sales@dmphotonics.comCONFLAT FLANGE CF63 standard (=4.5 inch outer, 2.5 inch inner diameter)Clear aperture size for the Si window: 60 mmThickness of the Si window: 4 mmOrientation: single crystal, <111>Flatness: 3 waves at 633 nmHousing or flange type/material: SS 304Max Temperature: 150 C degMin Temperature: 15 C degWavelength transmitted: transmission of femtosecond-generated THz radiation into UHV chamber: Frequency 0.5-5 THz (60-600 microns)Window material: Silicon optical gradeCoating: noneSilicon windows, lenses and prisms for infrared, THz and other applications sales@dmphotonics.com Silicon windows, lenses and prisms for infrared, THz and other applications sales@dmphotonics.comVacuum viewport Fused silica, Quartz, Sapphire, MgF2, BaF2, ZnSehttp://www.dmphotonics.com/Zinc-selenide-ZnSe-vacuum-viewport/vacuum-viewports-ZnSe.htmDel Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance.When you send us your inquiry please fill out the following form to indicate all important specifications and e-mail it to us with your inquiry.Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control.Windows Materials include:Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, PyrexSilicon prism for pulse compression:http://www.dmphotonics.com/ZnSe_prism/Pair%20of%20prisms%20made%20of%20Si%20for%20pulse%20compression.htm? HRFZ-Si Hyper-hemispherical lens, o 12 mm, height 7.1 mm http://www.dmphotonics.com/Silicon_optics/Silicon%20hemispherical%20lens.htm?Featured researchhttp://ee.princeton.edu/people/faculty/kaushik-sengupta Silicon-based integrated circuits have gone through a generational change in the last ten years. The ability to integrate billions of transistors with increasing cut-off frequencies and complex signal processing in a single chip has opened up a portion of the electromagnetic spectrum in the mm-Wave and THz frequency ranges previously unavailable to integrated technology. The capability to synthesize, control and manipulate such a large portion of the spectrum (DC-THz) and possibly even optical frequencies in a single versatile platform, has tremendous opportunities in creating cutting-edge technology for a wide range of novel applications from ultra-fast wireless communication to biosensing, imaging, spectroscopy, medical diagnostics and beyond. We believe future innovations in such diverse high-impact technology will not be achieved through innovations in one discipline, but through mutli-thronged approach and a close alliance of various allied scientific disciplines in a synergistic environment. In pursuit of this vision, we innovate on both techniques and architectures that can leverage the strengths of concepts and techniques across disciplines and blend them to create novel and high-performance integrated systems. Broadly my research interests areSilicon-based RF, mm-Wave and THz Circuits and SystemsOnchip Active Electromagnetic Field Synthesis and Control for Sensing and Actuation (RF-THz-Optical)Self-Healing and Reconfigurable Integrated Circuits and Systems in Silicon.Theoretical Understanding of Fundamental Limits of Circuits and Related Systems.
- New item - sales@dmphotonics.comVacuum window for a high power laser beam from air into an ultrahigh vacuum with the following specifications:- Clear aperture 36mm- Material: CaF2- Flatness: Lambda/10 @633nm- Wavefront distortion at 1bar pressure difference: < lambda/20- Thickness: 3mm and 4mm- Mounted in CF63 flange- Pressure: 1 bar atmosphere to UHV (10^-9mbar)CAD drawings and information about optical quality are available.