News tagged with laser frequency
Research team uses a laser frequency comb to calibrate spectrographs
(Phys.org) -- In the never ending quest to find out if there is life out there beyond our own planet, astronomers, astrophysicists and other researchers use all manner of tools to scan the sky looking for ...
May 31, 2012 |
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Scientists examine possibility of a phonon laser, or 'phaser'
(PhysOrg.com) -- While the optical laser celebrated its 50th anniversary earlier this year, some scientists have been working on a new type of coherent beam amplifier for sound rather than light. Scientists ...
Sep 07, 2010 |
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Physicists mix two lasers to create light at many frequencies
A team of physicists at UC Santa Barbara has seen the light, and it comes in many different colors. By aiming high- and low-frequency laser beams at a semiconductor, the researchers caused electrons to be ...
Mar 28, 2012 |
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No-photon laser: Physicists demonstrate 'superradiant' laser design
Physicists at JILA have demonstrated a novel "superradiant" laser design, which has the potential to be 100 to 1,000 times more stable than the best conventional visible lasers. This type of laser could boost ...
Apr 04, 2012 |
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Pair of aluminum atomic clocks reveal Einstein's relativity at a personal scale
Scientists have known for decades that time passes faster at higher elevations—a curious aspect of Einstein's theories of relativity that previously has been measured by comparing clocks on the earth's surface ...
Sep 23, 2010 |
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Using lasers to cool and manipulate molecules
(PhysOrg.com) -- "For years, we have been using laser cooling to trap and manipulate atoms," David DeMille tells PhysOrg.com. "This has been very useful for both basic science and many applications. Recent ...
Dec 07, 2009 |
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New laser technology prepares to revolutionize communications
As fiber optic technology continues to advance, it faces challenges from both its physical properties and its use of infrastructure. One emerging high-speed solution being developed at Stevens Institute of Technology uses ...
Mar 28, 2011 |
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'Microrings' could nix wires for communications in homes, offices
(PhysOrg.com) -- Purdue University researchers have developed a miniature device capable of converting ultrafast laser pulses into bursts of radio-frequency signals, a step toward making wires obsolete for ...
Mar 03, 2010 |
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Tiny ring laser accurately detects and counts nanoparticles
(PhysOrg.com) -- A microlaser no bigger than a pinprick can accurately detect and count individual viruses, the particles that jumpstart cloud formation or those that contaminate the air we breathe.
Jun 28, 2011 |
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Atomic clock comparison via data highways
(Phys.org) -- Optical atomic clocks measure time with unprecedented accuracy. However, it is the ability to compare clocks with one another that makes them applicable for high-precision tests in fundamental ...
Apr 27, 2012 |
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Quantum leap for phonon lasers
Physicists have taken major step forward in the development of practical phonon lasers, which emit sound in much the same way that optical lasers emit light. The development should lead to new, high-resolution ...
Feb 22, 2010 |
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Scientists report first monolithic terahertz solid-state transceiver
Sandia National Laboratories researchers have taken the first steps toward reducing the size and enhancing the functionality of devices in the terahertz (THz) frequency spectrum.
Jun 29, 2010 |
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Up-scale: Frequency converter enables ultra-high sensitivity infrared spectrometry
In what may prove to be a major development for scientists in fields ranging from forensics to quantum communications, researchers at the National Institute of Standards and Technology have developed a new, ...
Aug 26, 2009 |
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Fine-tuned: A wholly new approach to tuning a laser's frequency
(PhysOrg.com) -- For more than 30 years, scientists have been trying to harness the power of terahertz radiation. Tucked between microwaves and infrared rays on the electromagnetic spectrum, terahertz rays ...
Dec 04, 2009 |
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Monitoring food with millimeter waves
Has the packet been properly filled? Are there impurities in the chocolate? Have the plastic seams been welded correctly? Is there a knife hidden in the parcel? Answers to all these questions are provided ...
Dec 02, 2011 |
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