Ongoing Research Works
... Luminescent nanoparticles including silicon nanoparticles (QD), nano dye silica particles are currently used in many areas of bioanalysis. Silica based nanoparticles show less aggregation and little dye leakage. Using appropriate synthetic conditions, a large number of dye molecules can be incorpora ...
... Luminescent nanoparticles including silicon nanoparticles (QD), nano dye silica particles are currently used in many areas of bioanalysis. Silica based nanoparticles show less aggregation and little dye leakage. Using appropriate synthetic conditions, a large number of dye molecules can be incorpora ...
Opto-acoustic Imaging
... detailed picture of the ultrasonic movements over a surface to be built up very rapidly by optical scanning. In addition, the independent ultrasonic displacement measurements from different positions can be used to synthesize an image based on the synthetic aperture imaging approach. The usual metho ...
... detailed picture of the ultrasonic movements over a surface to be built up very rapidly by optical scanning. In addition, the independent ultrasonic displacement measurements from different positions can be used to synthesize an image based on the synthetic aperture imaging approach. The usual metho ...
OSA journals template (MSWORD)
... References must be published work, and numbered consecutively in order of their first citation. References should be listed individually at the end of the text and indicated in the text with a superscript number in square brackets. All of the references’ authors, as well as the titles of the referen ...
... References must be published work, and numbered consecutively in order of their first citation. References should be listed individually at the end of the text and indicated in the text with a superscript number in square brackets. All of the references’ authors, as well as the titles of the referen ...
Superluminal ring laser for hypersensitive sensing H. N. Yum, M. Salit,
... rate of rotation is proportional to the beat frequency between the two counter-propagating modes. If the RLG is now operated in the WLC mode, the rotation sensitivity will scale by ξ, just as described above. However, the quantum-limited frequency noise, which is proportional to the lifetime of a ph ...
... rate of rotation is proportional to the beat frequency between the two counter-propagating modes. If the RLG is now operated in the WLC mode, the rotation sensitivity will scale by ξ, just as described above. However, the quantum-limited frequency noise, which is proportional to the lifetime of a ph ...
A Further Look at Waveguide Lasers
... freedom is required. The dynamical evolution of all the degrees of freedom of the matter systems can be traced back and the spontaneous self-selection of the lasing modes, induced by the matter–radiation interaction, can be explored. 2) The time evolution of the lasing process can be analyzed includ ...
... freedom is required. The dynamical evolution of all the degrees of freedom of the matter systems can be traced back and the spontaneous self-selection of the lasing modes, induced by the matter–radiation interaction, can be explored. 2) The time evolution of the lasing process can be analyzed includ ...
E - Uni Regensburg/Physik
... Absorbed laser pulse heats electrons at first ⇒ shorter laser pulses - give higher (electron) temperatures for same energy - minimize the heat-affected zones - yields higher reproducibility - give higher process efficiency ...
... Absorbed laser pulse heats electrons at first ⇒ shorter laser pulses - give higher (electron) temperatures for same energy - minimize the heat-affected zones - yields higher reproducibility - give higher process efficiency ...
Calculations Table 1: Single Slit
... !Safety!: Do not look into the laser beam directly and do not point the laser beam toward anyone’s eyes. This can cause permanent vision damage. Introduction: The famous scientist Isaac Newton considered light to be made up of small particles. In many ways it does behave as if it were made up of par ...
... !Safety!: Do not look into the laser beam directly and do not point the laser beam toward anyone’s eyes. This can cause permanent vision damage. Introduction: The famous scientist Isaac Newton considered light to be made up of small particles. In many ways it does behave as if it were made up of par ...
LASER Introduction: • The word laser stands for `Light Amplification
... Difference between Spontaneous and stimulated emission: In spontaneous emission the emitted photon has energy hυ and can move in any random direction whereas in stimulated emission for energy incident photon, we have two outgoing photons moving in the same directions. In spontaneous emission the ...
... Difference between Spontaneous and stimulated emission: In spontaneous emission the emitted photon has energy hυ and can move in any random direction whereas in stimulated emission for energy incident photon, we have two outgoing photons moving in the same directions. In spontaneous emission the ...
Color center production by femtosecond-pulse laser
... study of defects produced, such as color centers, is then a useful approach, which can be applied to understand the relevance of such degradation processes and their microscopic mechanisms. The threshold for color center creation was 1.9 TW/cm2 for LiYF4. Color center lasers have some important opti ...
... study of defects produced, such as color centers, is then a useful approach, which can be applied to understand the relevance of such degradation processes and their microscopic mechanisms. The threshold for color center creation was 1.9 TW/cm2 for LiYF4. Color center lasers have some important opti ...
Ultrafast Lasers Based on Quantum Dot Structures
... resonator. Summing all the mode frequencies with a fixed phase relationship results in a periodic sequence of intense ultrashort pulses with a repetition rate related inversely to the cavity round-trip time. The locking of the phases can be achieved either through an applied modulation of the losses ...
... resonator. Summing all the mode frequencies with a fixed phase relationship results in a periodic sequence of intense ultrashort pulses with a repetition rate related inversely to the cavity round-trip time. The locking of the phases can be achieved either through an applied modulation of the losses ...
What limits the maximum output power of long-wavelength
... laser simulation tool.1 The software self-consistently combines 2-D carrier transport, heat flux, optical gain computation, and .2 The same wave guiding within the transversal plane software was employed previously to investigate temperature effects in pulsed laser operation, showing excellent agree ...
... laser simulation tool.1 The software self-consistently combines 2-D carrier transport, heat flux, optical gain computation, and .2 The same wave guiding within the transversal plane software was employed previously to investigate temperature effects in pulsed laser operation, showing excellent agree ...
Photonic band structure and emission characteristics of a metal-backed
... The strong correlation between device PL and reflectivity is due to the influence of first order Bragg scattering on both processes. Similar correlation has been observed between the emission from, and the transmission through, a DFB laser fabricated on a silica substrate.8 In both cases the device ...
... The strong correlation between device PL and reflectivity is due to the influence of first order Bragg scattering on both processes. Similar correlation has been observed between the emission from, and the transmission through, a DFB laser fabricated on a silica substrate.8 In both cases the device ...
Semiconductor Laser Diode
... In the first row, we see the carriers when a low current is applied. In this regime we are dealing with spontaneous emission for the most part. By looking at the photon densities of the emitted light for this regime, one will notice, that the energy range of the emitted light is in distributed over ...
... In the first row, we see the carriers when a low current is applied. In this regime we are dealing with spontaneous emission for the most part. By looking at the photon densities of the emitted light for this regime, one will notice, that the energy range of the emitted light is in distributed over ...
2. Ring-laser gyroscopes (RLGs)
... and lasers with very narrow bandwidth and naturally high spatial coherence (instead of forcing coherence with slits as Michelson did), the number of turns needed could be reduced considerably. Even without this, 8400 turns of a 0.4 mm thick* cable results in a coil depth of 3–4 metres; this is far m ...
... and lasers with very narrow bandwidth and naturally high spatial coherence (instead of forcing coherence with slits as Michelson did), the number of turns needed could be reduced considerably. Even without this, 8400 turns of a 0.4 mm thick* cable results in a coil depth of 3–4 metres; this is far m ...
Modern battlefield and new materials for eyes protection
... explosives, but the energy produced is millions of times higher and the temperatures reach tens of millions of Celsius degree. The most of electromagnetic radiation in the visible, infrared (IR), and ultraviolet (UV) spectrum regions is emitted from the fireball surface within the first minute after ...
... explosives, but the energy produced is millions of times higher and the temperatures reach tens of millions of Celsius degree. The most of electromagnetic radiation in the visible, infrared (IR), and ultraviolet (UV) spectrum regions is emitted from the fireball surface within the first minute after ...
Soft-x-ray interferometer for single-shot laser linewidth measurements
... grating G1, the x-ray laser beam is diffracted into different orders. By properly choosing the incidence angle and blaze of the grating, one can ensure that most of the incoming energy is split evenly between the zero and the first diffraction orders. As can be readily shown with geometric considera ...
... grating G1, the x-ray laser beam is diffracted into different orders. By properly choosing the incidence angle and blaze of the grating, one can ensure that most of the incoming energy is split evenly between the zero and the first diffraction orders. As can be readily shown with geometric considera ...
... 1. A Quartz crystal of thickness 0.001 m vibrates in its fundamental frequency. Calculate its frequency. (Given that E= 7.9X1010 and ρ = 2650Kg/m3 for quartz) 2. An ultrasonic interferometer used to measure the velocity in sea water. If the distance between two constructive anti nodes is 0.55 mm. Co ...
Demonstration of Optical Rotatory Dispersion of Sucrose
... prism or polarizer sheet in order to ensure maximum linear polarization. If the output of the laser system is nearly linearly polarized, this polarizer feature may not be necessary, particularly for simple demonstrations. To demonstrate the effect, corn syrup (e.g., Karo syrup) is ideal; however, co ...
... prism or polarizer sheet in order to ensure maximum linear polarization. If the output of the laser system is nearly linearly polarized, this polarizer feature may not be necessary, particularly for simple demonstrations. To demonstrate the effect, corn syrup (e.g., Karo syrup) is ideal; however, co ...
Single-frequency blue light generation by single-pass
... Visible laser sources with the possibility of selecting the desired wavelength are interesting to a number of applications including spectroscopy and bio-photonics. Visible diode lasers have appeared in various spectral regions including the blue, green, and red. Single-mode visible diode lasers, ho ...
... Visible laser sources with the possibility of selecting the desired wavelength are interesting to a number of applications including spectroscopy and bio-photonics. Visible diode lasers have appeared in various spectral regions including the blue, green, and red. Single-mode visible diode lasers, ho ...
The Spectrum Analyzer and The Mode Structure
... laser light consists of discrete frequency components. We can, however, determine how close the laser light may be to a single frequency using a Fabry-Perot Interferometer.1 The Fabry-Perot Interferometer consists of a pair of mirrors, with inner surfaces highly reflective to laser light, whose sepa ...
... laser light consists of discrete frequency components. We can, however, determine how close the laser light may be to a single frequency using a Fabry-Perot Interferometer.1 The Fabry-Perot Interferometer consists of a pair of mirrors, with inner surfaces highly reflective to laser light, whose sepa ...
Laser Cutting
... possibility of a process called Light Amplification. If enough excited atoms could be put together then a passing photon could encourage the production of duplicate photons, thousands even millions or billions of them. Of course this was all theoretical, it was not until the 1950s that the detail o ...
... possibility of a process called Light Amplification. If enough excited atoms could be put together then a passing photon could encourage the production of duplicate photons, thousands even millions or billions of them. Of course this was all theoretical, it was not until the 1950s that the detail o ...
Coherent laser radar system using optical homodyne detection
... laser radar has been demonstrated in CW operation, as well as pulsed amplitude and frequency operation. Distance can be measured by modulating the beam output, and measuring the round trip delay in the return signal, to high accuracy. Additionally, the return light scattered from the target also car ...
... laser radar has been demonstrated in CW operation, as well as pulsed amplitude and frequency operation. Distance can be measured by modulating the beam output, and measuring the round trip delay in the return signal, to high accuracy. Additionally, the return light scattered from the target also car ...
Student Study Guide
... Light is a result of excited atoms giving off energy. Atoms are the building blocks of matter and consist of a positively charged nucleus of protons and neutrons orbited by a cloud of negatively charged electrons. Heat, light, and electricity are among the things that can excite atoms. Once excited, ...
... Light is a result of excited atoms giving off energy. Atoms are the building blocks of matter and consist of a positively charged nucleus of protons and neutrons orbited by a cloud of negatively charged electrons. Heat, light, and electricity are among the things that can excite atoms. Once excited, ...
Synchronized ti scattering microscopy
... The experimental setup of the time-lens source synchronized to a Ti:Sa mode-locked laser (Mira 900, Coherent) is shown in Fig. 1 (dotted box). The GaAs photodetector (ET-4000, EOT) converts the 76-MHz, 2-ps optical pulse train into an RF pulse train, which is then divided into two branches. One bran ...
... The experimental setup of the time-lens source synchronized to a Ti:Sa mode-locked laser (Mira 900, Coherent) is shown in Fig. 1 (dotted box). The GaAs photodetector (ET-4000, EOT) converts the 76-MHz, 2-ps optical pulse train into an RF pulse train, which is then divided into two branches. One bran ...
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term ""laser"" originated as an acronym for ""light amplification by stimulated emission of radiation"". The first laser was built in 1960 by Theodore H. Maiman at Hughes Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light coherently. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond.Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.