A pulsed laser emits light in a series of short pulses, each having a duration of 24.4 ms. The average power of each pulse is 4.97 mW, and the wavelength of the light is 633 nm.
a) Find the energy of each pulse (in J)
b) Find the # of photons in each pulse.
a)
Energy = Power * Time
= 4.97 mW * 24.4 ms
= 121 microJoules
or 1.21 * 10^-4 Joules
b)
Energy of a Photon = h * c / wavelength.
where h is Planck's constant, = 6.63 * 10^-34
and c is the speed of light = 3.0 * 10^8.
Energy of a Photon = 6.63 * 10^-34 * 3.0 * 10^8 / (633 * 10^-9)
= 0.0314 * 10^-17
Number of photons = (121 * 10^-6) / (0.0314 * 10^-17)
= 3851 * 10^11
= 3.85 * 10^14
A comprehensive, uptodate review of the physics and applications of a major class of laser, the most important example of which is the copper vapour laser. A collection of 50 papers written by the worlds leaders in the field. Papers cover: the early history of pulsed metal vapour lasters; the plasma kinetics and excitation mechanisms of self terminating and recombination metal vapour lasers; beam quality issues for applications; frequency harmonic generation for midUV applications; highprecision processing of metals, ceramics, glasses and plastics using metal vapour lasers; applications in medicine, including oncology and dermatology; applications in science such as spectroscopy and mass spectrometry. A practical source of information on the physics, engineering and applications of metal vapour lasers. Audience: scientists, teachers and graduate researchers working in the fields of gas lasers, laser optics, gas discharges, optoelectronics and laser applications in industry, science and medicine. Author: Little, Chris E./ Sabotinov, Nikola V./ Little, C. E. Series Title: NATO Asi Series Series Number: 5 Binding Type: Hardcover Number of Pages: 500 Publication Date: 1996/03/31 Language: English Dimensions: 9.48 x 6.44 x 1.30 inches
High Quality Content by WIKIPEDIA articles Laser ablation is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is typically converted to a plasma. Usually, laser ablation refers to removing material with a pulsed laser, but it is possible to ablate material with a continuous wave laser beam if the laser intensity is high enough. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 96 Publication Date: 2010/10/01 Language: English Dimensions: 6.00 x 9.02 x 0.23 inches
High Quality Content by WIKIPEDIA articles Pulsed power is the term used to describe the science and technology of accumulating energy over a relatively long period of time and releasing it very quickly thus increasing the instantaneous power. Steady accumulation of energy followed by its rapid release can result in the delivery of a larger amount of instantaneous power over a shorter period of time (although the total energy is the same). Energy is typically stored within electrostatic fields (capacitors), magnetic fields (inductor), as mechanical energy (using large flywheels connected to special purpose high current alternators), or as chemical energy (highcurrent leadacid batteries, or explosives). By releasing the stored energy over a very short interval (a process that is called energy compression), a huge amount of peak power can be delivered to a load. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2011/01/24 Language: English Dimensions: 6.00 x 9.00 x 0.30 inches
This first book on pulsed magnet design deals with the design of pulsed, nondestructive coils for the generation of high magnetic fields. It provides readers with a concise and comprehensive text describing every aspect of coil construction. Author: Kratz, Robert/ Wyder, Peter Series Title: Engineering Materials Binding Type: Hardcover Number of Pages: 190 Publication Date: 2002/10/03 Language: English Dimensions: 9.21 x 6.14 x 0.50 inches
Features of the Pulsed Galvanic Stimulator: Single-channel output. Output voltage 0 - 240V max. (Single channel, load 500 Ohm), 0 - 350V Max. (Open circuit). Positive or negative wave form. Synchronous or Alternation. Alternation mode-LED alternates between green and red color. 5 µS pulse duration. 100 µS intrapulse interval. System includes: stimulator, lead wires, four self-stick hypoallergenic disposable electrodes, 9-volt battery and AC adapter, hard plastic carrying case and instruction booklet. 9-volt battery or AC adapter. One-year manufacturer warranty.
High Quality Content by WIKIPEDIA articles Pulsed electric field (PEF) processing is a method for processing cells by means of brief pulses of a strong electric field. PEF holds potential as a type of low temperature alternative pasteurization process for sterilizing food products. In PEF processing, a substance is placed between two electrodes, then the pulsed electric field is applied. The electric field enlarges the pores of the cell membranes which kills the cells and releases their contents. PEF for food processing is a developing technology still being researched. There have been limited industrial applications of PEF processing for pasteurizing fruit juices. Nearly all cells have pores which control the flow of nutrients and wastes into and out of the cell. Once the pores are sufficiently enlarged, the contents of the cell are released into the surrounding medium and foreign matter may enter the cell membrane. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 80 Publication Date: 2011/01/24 Language: English Dimensions: 6.00 x 9.00 x 0.19 inches
High Quality Content by WIKIPEDIA articles A dye laser is a laser which uses an organic dye as the lasing medium, usually as a liquid solution. Compared to gases and most solid state lasing media, a dye can usually be used for a much wider range of wavelengths. The wide bandwidth makes them particularly suitable for tunable lasers and pulsed lasers. Moreover, the dye can be replaced by another type in order to generate different wavelengths with the same laser, although this usually requires replacing other optical components in the laser as well. Dye lasers were independently discovered by P. P. Sorokin and F. P. Schfer in 1966. In addition to the usual liquid state, dye lasers are also available as solid state dye lasers. SSDL use dyedoped organic matrices as gain medium. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 80 Publication Date: 2010/06/27 Language: English Dimensions: 5.98 x 9.01 x 0.19 inches
Author: Schleher, D. Curtis Series Title: Artech House Radar Library (Hardcover) Binding Type: Hardcover Number of Pages: 668 Publication Date: 1999/11/01 Language: English Dimensions: 9.40 x 6.30 x 1.80 inches
Author: Street, Euring J./ Street, Eur I./ Street, J. a. Binding Type: Hardcover Number of Pages: 58 Publication Date: 2011/01/24 Language: English Dimensions: 11.50 x 8.10 x 0.20 inches
The use of lasers for the deposition and processing of electronic and photonic materials is becoming increasingly widespread. Advances in processing technology are reducing costs and increasing throughput. Laser deposition of photonic materials and laser processing techniques can produce high quality devices with novel properties. "Laser growth and processing of photonic devices" is the first book to review this increasingly important field. Part one investigates laser-induced growth of materials and surface structures, pulsed laser deposition techniques, the formation of nanocones and the fabrication of periodic photonic microstructures. Part two focuses on laser-induced three-dimensional micro- and nano-structuring. It also explores multiphoton lithography, processing and fabrication, laser-based micro- and nano-fabrication, laser-induced soft matter organization and microstructuring, and laser-assisted polymer joining methods. The book concludes in part three with an investigation into laser fabrication and manipulation of photonic structures and devices. Part three also examines laser seeding and thermal processing of glass with nanoscale resolution, laser-induced refractive index manipulation, and the thermal writing of photonic devices in glass and polymers.
Laserglow s Aquarius Pro series of blue portable lasers are a true achievement in portable laser technology. These lasers incorporate the same technology found in benchtop lab lasers into a compact portable handheld housing. Pulsed at 700Hz to achieve stable high output power without the use of bulky cooling systems the Aquarius Pro allows for a long runtime on a single CR123A battery.
Laserglow s Aquarius Pro series of blue portable lasers are a true achievement in portable laser technology. These lasers incorporate the same technology found in benchtop lab lasers into a compact portable handheld housing. Pulsed at 700Hz to achieve stable high output power without the use of bulky cooling systems the Aquarius Pro allows for a long runtime on a single CR123A battery.
Laserglow s Aquarius Pro series of blue portable lasers are a true achievement in portable laser technology. These lasers incorporate the same technology found in benchtop lab lasers into a compact portable handheld housing. Pulsed at 700Hz to achieve stable high output power without the use of bulky cooling systems the Aquarius Pro allows for a long runtime on a single CR123A battery.
Laserglow s Aquarius Pro series of blue portable lasers are a true achievement in portable laser technology. These lasers incorporate the same technology found in benchtop lab lasers into a compact portable handheld housing. Pulsed at 700Hz to achieve stable high output power without the use of bulky cooling systems the Aquarius Pro allows for a long runtime on a single CR123A battery.
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pulsed laser deposition
Laser hair removal or pulsed light? Does anyone know which is better?
individual results vary... talk to a dermatologist and have a small patch tested in order see which is better..
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