Manual for Diode Laser Spectroscopy
... In order to do spectroscopy, i.e. to measure frequency or energy differences in the energy splitting of rubidium, you would like to establish a relationship between the voltage applied to the piezo controller and the output frequency of the laser. Fortunately, we find the change in frequency to be d ...
... In order to do spectroscopy, i.e. to measure frequency or energy differences in the energy splitting of rubidium, you would like to establish a relationship between the voltage applied to the piezo controller and the output frequency of the laser. Fortunately, we find the change in frequency to be d ...
Advanced Applications
... photon. The Maxwell-Boltzmann velocity distribution in a thermal gas is the cause of Doppler Broadening in Absorption Spectroscopy Signals. To create a more narrow laser lock, Doppler Broadening is eliminated by use of the well known Saturated Absorption technique that resolves the hyperfine structu ...
... photon. The Maxwell-Boltzmann velocity distribution in a thermal gas is the cause of Doppler Broadening in Absorption Spectroscopy Signals. To create a more narrow laser lock, Doppler Broadening is eliminated by use of the well known Saturated Absorption technique that resolves the hyperfine structu ...
Week 9 Wed. (Lesson 15) Coherence and Optical Tomography
... • Required for interference and diffraction • Before lasers need to place slits far from source or pass light through slit so only part of source seen Temporal Coherence • Correlation of phase at the same point but at different times • Regular sources rapidly change phase relationships • Single atom ...
... • Required for interference and diffraction • Before lasers need to place slits far from source or pass light through slit so only part of source seen Temporal Coherence • Correlation of phase at the same point but at different times • Regular sources rapidly change phase relationships • Single atom ...
Extending the Effective Ranging Depth of Spectral Domain Optical
... depth is defined as the imaging depth at which the sensitivity has decayed −6 dB from the peak value [2]. For FDOCT, the complex conjugate ambiguity further limits the imaging depth to one half of the full-range imaging space. Another limitation on the imaging depth of the FDOCT is posed by the fini ...
... depth is defined as the imaging depth at which the sensitivity has decayed −6 dB from the peak value [2]. For FDOCT, the complex conjugate ambiguity further limits the imaging depth to one half of the full-range imaging space. Another limitation on the imaging depth of the FDOCT is posed by the fini ...
Directional Reflection measurements on
... The only difference is that the laser beam now has to follow the exact part of the sample beam. This is accomplished with the help of two mirrors just before and after the sample beam mirror block. This mirrors are mounted on a vertical sliding mechanism that is fixed to the knob on top of the mirro ...
... The only difference is that the laser beam now has to follow the exact part of the sample beam. This is accomplished with the help of two mirrors just before and after the sample beam mirror block. This mirrors are mounted on a vertical sliding mechanism that is fixed to the knob on top of the mirro ...
Design and Fabrication of Tb -Doped Silicon Oxy
... emanating from the microdisk edge and focus it onto the entrance slit of a monochromator. The excitation power was about 10 mW, and the spectral resolution of the optical setup was about 0.5 nm. Fig. 4(a) shows the side-PL spectra from a microdisk, together with the calculated WGM resonance peak pos ...
... emanating from the microdisk edge and focus it onto the entrance slit of a monochromator. The excitation power was about 10 mW, and the spectral resolution of the optical setup was about 0.5 nm. Fig. 4(a) shows the side-PL spectra from a microdisk, together with the calculated WGM resonance peak pos ...
Light Source Notes
... providing data basically free of error due to pointing instability. A similar approach has been used in a Dual-beam laser deflection sensor described in Ref. [11]. Unfortunately, the compensation of the laser pointing instability with a reference beam has some limitations. Indeed, the optical paths ...
... providing data basically free of error due to pointing instability. A similar approach has been used in a Dual-beam laser deflection sensor described in Ref. [11]. Unfortunately, the compensation of the laser pointing instability with a reference beam has some limitations. Indeed, the optical paths ...
Get PDF - OSA Publishing
... At the start of this millennium, the principles of structured illumination microscopy (SIM) had been established and the concept of resolution doubling demonstrated experimentally in two dimensions. Breathtaking advances have since taken place, making SIM one of the most powerful and versatile super ...
... At the start of this millennium, the principles of structured illumination microscopy (SIM) had been established and the concept of resolution doubling demonstrated experimentally in two dimensions. Breathtaking advances have since taken place, making SIM one of the most powerful and versatile super ...
Laser Bleaching of Carbon Nanotubes Suspension in
... quick-response photodetector which can operate in a wide spectral range [9] at high temeperatures [10]. A fundamentally new type of a polarization analyzer of laser radiation on the basis of this study has been designed and made [11], the principle of operation being the recording of the polarizat ...
... quick-response photodetector which can operate in a wide spectral range [9] at high temeperatures [10]. A fundamentally new type of a polarization analyzer of laser radiation on the basis of this study has been designed and made [11], the principle of operation being the recording of the polarizat ...
Ultrafast electronic dynamics in polyatomic molecules studied using
... femtoseconds, inherent to SASE. Picosecond time resolution can be obtained routinely, and subpicosecond time-resolution is obtainable using measurement of individual pulse timing. The severe limitations of free electron lasers based on using normal-conducting linear accelerators are low repetition r ...
... femtoseconds, inherent to SASE. Picosecond time resolution can be obtained routinely, and subpicosecond time-resolution is obtainable using measurement of individual pulse timing. The severe limitations of free electron lasers based on using normal-conducting linear accelerators are low repetition r ...
EXPERIMENT 8. Monolayer Characterization: Contact angles
... and ∆, we can in principle calculate two of the parameters in the model, e.g., film thickness and refractive index for one film. The model looks daunting at first because we have to know n and k for air, the film, and the substrate as well as air. Fortunately, k is zero for air and most organic film ...
... and ∆, we can in principle calculate two of the parameters in the model, e.g., film thickness and refractive index for one film. The model looks daunting at first because we have to know n and k for air, the film, and the substrate as well as air. Fortunately, k is zero for air and most organic film ...
Electron beam lithography designed silver nano
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
... EBL, on the other hand, is a modified SEM system that has superior properties compared to other optical or chemical patterning techniques, such as the precise placement and design of arbitrarily shaped NPs with a large selection of geometries of various sizes with fine features. It offers a high res ...
Solid-state laser system for laser cooling of Sodium - ENS-phys
... coupler M1 with lower reflectivities chosen such as to optimize the intracavity conversion (see section IV below). Mirrors M1 , M2 are plane, while M3 , M4 are concave with radius of curvature Rc = 100 mm. At the crystal location, the 1064 nm (1319 nm) beam is focused to a waist w1 = 45 µm (w2 = 47 ...
... coupler M1 with lower reflectivities chosen such as to optimize the intracavity conversion (see section IV below). Mirrors M1 , M2 are plane, while M3 , M4 are concave with radius of curvature Rc = 100 mm. At the crystal location, the 1064 nm (1319 nm) beam is focused to a waist w1 = 45 µm (w2 = 47 ...
Testing the Limits
... by focusing at an optimal depth. When optical microscopy with DIC is used to detect bulk material damage, the optics under test are shot with a laser at varying energies and damage is observed using a number of illumination techniques. The energy at which laser transmission begins to drop is the ene ...
... by focusing at an optimal depth. When optical microscopy with DIC is used to detect bulk material damage, the optics under test are shot with a laser at varying energies and damage is observed using a number of illumination techniques. The energy at which laser transmission begins to drop is the ene ...
Absolute Specular Reflectance Measurements at Fixed
... intended sample measurement but also has general reflectance characteristics similar to those of the sample. Measurements with the PELA 6000 VN Series accessories do not suffer from such difficulties in finding suitable calibrated reflectance standards, as none are required in this absolute measurem ...
... intended sample measurement but also has general reflectance characteristics similar to those of the sample. Measurements with the PELA 6000 VN Series accessories do not suffer from such difficulties in finding suitable calibrated reflectance standards, as none are required in this absolute measurem ...
Rapid adiabatic passage in a Pr3+:Y2SiO5 crystal - IAP TU
... Manipulation of population distributions as well as the linear and nonlinear optical response in coherently driven quantum systems is a major topic in quantum optics at present. Adiabatic, coherent processes, e.g. electromagnetically induced transparency (EIT) (see [1] and references ...
... Manipulation of population distributions as well as the linear and nonlinear optical response in coherently driven quantum systems is a major topic in quantum optics at present. Adiabatic, coherent processes, e.g. electromagnetically induced transparency (EIT) (see [1] and references ...
Dark Resonances From Optical Pumping to Cold Atoms and
... equations with time-independent coefficients which can be solved exactly. One finds that, when the detuning ∆ from the resonance Raman condition is equal to 0, the population σee of the excited state e vanishes: there is no fluorescence. Simultaneously, the off diagonal element σg1 g2 of the atomic ...
... equations with time-independent coefficients which can be solved exactly. One finds that, when the detuning ∆ from the resonance Raman condition is equal to 0, the population σee of the excited state e vanishes: there is no fluorescence. Simultaneously, the off diagonal element σg1 g2 of the atomic ...
Pulsed Quasi-monochromatic x-ray source for radiography
... 3. Better spectral resolution can be obtained in the scheme when the radiation angle of incidence on the crystal surface is close to the crystal normal on the Rowland circle. On the other hand, it has various disadvantages over the flat crystal spectrometer such as 1. The bending of the crystals i ...
... 3. Better spectral resolution can be obtained in the scheme when the radiation angle of incidence on the crystal surface is close to the crystal normal on the Rowland circle. On the other hand, it has various disadvantages over the flat crystal spectrometer such as 1. The bending of the crystals i ...
Practical uses of femtosecond laser micro
... micro-chemistry. Laser ablation, because of its non-contact nature, allows the micromachining and surface patterning of materials with minimal mechanical and thermal deformation. It is now well known that for many of these applications, the femtosecond regime offers advantages over the nanosecond re ...
... micro-chemistry. Laser ablation, because of its non-contact nature, allows the micromachining and surface patterning of materials with minimal mechanical and thermal deformation. It is now well known that for many of these applications, the femtosecond regime offers advantages over the nanosecond re ...
High-peak-power pulse generation from a
... at a constant high oscillator injection for different amplifier currents are similar to that of Fig. 1, showing only a slight redshift caused by self-heating (∼90 pm ∕A at I MO 500 mA). At low oscillator injection, mode hopping was observed. Figure 2 shows the spectra measured at a constant I MO ...
... at a constant high oscillator injection for different amplifier currents are similar to that of Fig. 1, showing only a slight redshift caused by self-heating (∼90 pm ∕A at I MO 500 mA). At low oscillator injection, mode hopping was observed. Figure 2 shows the spectra measured at a constant I MO ...
A day in the life of a Laser scientist
... make the application work as well as possible. (CSIRO, laser manufacturers, medical companies and DSTO (Defence Science and Technology Organisation) • Inventing stuff and entrepeneurship: We invented a new type of laser and in 2004 formed a company to commercialise it. • Commercialising research: Fi ...
... make the application work as well as possible. (CSIRO, laser manufacturers, medical companies and DSTO (Defence Science and Technology Organisation) • Inventing stuff and entrepeneurship: We invented a new type of laser and in 2004 formed a company to commercialise it. • Commercialising research: Fi ...
CW mode-locked dye lasers for ultra fast spectroscopic studies
... Picosecond pulses were first obtained from passively mode-locked cw dye lasers in 1974.*At least two groups have subsequently obtained pulses of 0.3 ps (300 fs) duration, the shortest light pulses so far produced by any laser. Figure 2 shows the optical set up and pulse temporal and spectral propert ...
... Picosecond pulses were first obtained from passively mode-locked cw dye lasers in 1974.*At least two groups have subsequently obtained pulses of 0.3 ps (300 fs) duration, the shortest light pulses so far produced by any laser. Figure 2 shows the optical set up and pulse temporal and spectral propert ...
Displacement Measuring Interferometry
... 4.9 Summary: Using Displacement Interferometry............................................................. 221 References......................................................................................................................................222 ...
... 4.9 Summary: Using Displacement Interferometry............................................................. 221 References......................................................................................................................................222 ...
Laser ranging: a critical review of usual techniques
... not used and fast measurement applications such as scanning. In addition, averaging enables millimeter or even submillimeter precision to be achieved. The advantage of the TOF system arises from the direct nature of its sensing as both the transmitted and returned signals follow essentially the same ...
... not used and fast measurement applications such as scanning. In addition, averaging enables millimeter or even submillimeter precision to be achieved. The advantage of the TOF system arises from the direct nature of its sensing as both the transmitted and returned signals follow essentially the same ...
Relation between s-Polarized and p-Polarized Internal Reflection
... Polarized infrared (IR) spectroscopy allows one to probe the orientation of chemical bonds.1-17 The features of polarized IR spectroscopy include (1) simultaneous probing of a wide variety of chemical bonds in organic, inorganic or hybrid materials, (2) sensitivity to measure films down to molecular ...
... Polarized infrared (IR) spectroscopy allows one to probe the orientation of chemical bonds.1-17 The features of polarized IR spectroscopy include (1) simultaneous probing of a wide variety of chemical bonds in organic, inorganic or hybrid materials, (2) sensitivity to measure films down to molecular ...
AFM-IR
AFM-IR refers to atomic force microscope (AFM) based infrared (IR) spectroscopy. AFM-IR is a technique for chemical analysis of samples at nanoscale spatial resolution. AFM-IR is related to techniques including Tip-Enhanced Raman Spectroscopy (TERS) and scanning near-field optical microscopy (SNOM) and other methods of vibrational analysis with scanning probe microscopy. The AFM-IR technique uses a sharp tip of an AFM probe to measure the absorption of infrared light by a sample. Recording the amount of IR absorption as a function of wavelength or wavenumber creates nanoscale IR absorption spectra, which can be used to chemically characterize and even identify unknown materials. Recording the IR absorption as a function of position can be used to create chemical composition maps that show the spatial distribution of different chemical components. AFM-IR can overcome the diffraction limit that limits the spatial resolution of conventional infrared microscopy and microspectroscopy to the scale of several microns. AFM-IR can achieve spatial resolution down to around 20 nm, limited in some case only by the sharpness of the AFM probe tip and sensitivity down to the scale of molecular monolayers.