Liquid crystals measure light intensity
Tags: LASER beams
Related Articles
- Laser beam goes to new lengths. // R&D Magazine;Mar96, Vol. 38 Issue 4, p11
Reports that the Center for Ultrafast Optical Science at the University of Michigan, has produced a 20-m-long low-energy beam of laser light. Aims of laser beam.
- Plasma guides high-energy laser pulses. Carts, Yvonne A. // Laser Focus World;Jan94, Vol. 30 Issue 1, p33
Presents information on two approaches which are being developed by researchers, Charles Durfee III and Howard M. Milchberg, to keep high-energy laser beams collimated. Demonstration of optical guiding of intense laser pulses over a range 24 times longer than the laser's Rayleigh length.
- Proposed international standard for laser-beam quality falls short. Lawrence, George N. // Laser Focus World;Jul94, Vol. 30 Issue 7, p109
Discusses the limitations of the International Organization for Standardization's (ISO) beam propagation factor (M2) as a standard of laser beam quality. How the M2 method works; Sensitivity of the second moment to widely scattered light; Difference in values at higher spatial frequencies. ...
- Seeing is believing with visual laser-beam diagnostics. Roundy, Carlos B. // Laser Focus World;Jul94, Vol. 30 Issue 7, p117
Focuses on the real-time visualization of laser beam profiles. Solid-state matrix detector array cameras and computer processing; Linear arrays of silicon or pyroelectric detectors and devices; Computerized technology for displaying beam profiles from two-dimensional array cameras.
- Dispersion-compensating fiber transmits sub-100-femtosecond pulses. // Laser Focus World;Sep96, Vol. 32 Issue 9, p13
Reports that researchers from West Lafayette, Indiana-based Purdue University and Murray Hill, New Jersey-based Lucent Technologies concatenated positive-dispersion-slope single-mode fiber with negative-dispersion-slope dispersion-compensating fiber (DCF) to transmit recompressed laser pulses. ...
- Diode-pumped laser amplifiers increase 2-micronm output energy by an order of magnitude. // Laser Focus World;Feb97, Vol. 33 Issue 2, p9
Reports that researchers at the Remote Sensing Technology Branch of the US National Aeronautics and Space Administration (NASA) Langley Research Center in Hampton, Virginia have produced a 700-mJ, 400-ns-long pulses from an amplified flashlamp-pumped Ho, Tm, Er;YLF Q-switched oscillator. Design...
- Laser induces nonphotochemical nucleation in supersaturated urea solution. // Laser Focus World;Feb97, Vol. 33 Issue 2, p11
Reports that Bruce Garetz and colleagues at Polytechnic University in Brooklyn, New York City have observed that the electric field of a plane-polarized laser beam induces crystallization in a supersaturated aqueous solution of urea. Crystallization as a new photophysical phenomenon related to...
- Tissue produces harmonics with ultrashort pulses. Peach, Laurie Ann // Laser Focus World;Feb97, Vol. 33 Issue 2, p46
Reports that researchers in the United States have generated second- and third-harmonic signals of femtosecond and picosecond laser pulses. Conversion efficiencies; Potential for using light as a noninvasive diagnostic and therapeutic tool for biomedical applications such as detecting...
- Education key to safe use of laser pointers. Hejlik, Karl // Laser Focus World;Sep98, Vol. 34 Issue 9, p63
Discusses the importance of education for the safe use of laser pointers. Government policy of the United States and Great Britain regarding laser pointers; Secondary hazards of the device; Laser pointer tips.
