Femtosecond pulses create broadband light in diamond

Oct. 1, 2008
Although broadband sideband generation has been observed in certain crystals and in chemical-vapor-deposition (CVD) diamond using stimulated Raman scattering (SRS) with nanosecond and picosecond lasers, researchers at Texas A&M University (College Station, TX) have now observed broadband generation in diamond using femtosecond laser pulses.

Although broadband sideband generation has been observed in certain crystals and in chemical-vapor-deposition (CVD) diamond using stimulated Raman scattering (SRS) with nanosecond and picosecond lasers, researchers at Texas A&M University (College Station, TX) have now observed broadband generation in diamond using femtosecond laser pulsesan important move toward generating broad-spectrum, subfemtosecond light waveforms in solids. These subfemtosecond light waves have applications in ultrafast science and technology.

When the researchers apply a Stokes pulse (630 nm) and a pump pulse (584 nm) to a 500-µm-thick diamond, up to 18 multicolored beams are generated. Interference measurements confirm that the process creates mutually coherent sidebands; the researchers postulate that a single-cycle, 0.5-fs-wide pulse could be obtained with proper phase matching of the generated beams. When three beams are used with the sample in a boxed coherent anti-Stokes Raman scattering configuration, a two-dimensional array of multicolored beams is produced through SRS, four-wave mixing, and six-wave mixing. The researchers are working to optimize the broadband generation process by optimizing the input wavelengths and the optics that couple the signals into the diamond, and by using a thicker diamond sample for increased Raman gain. Contact Miaochan Zhi at [email protected].

About the Author

LFW Staff

Published since 1965, Laser Focus World—a brand and magazine for engineers, researchers, scientists, and technical professionals—provides comprehensive global coverage of optoelectronic technologies, applications, and markets. With 80,000+ qualified print subscribers in print and over a half-million annual visitors to our online content, we are the go-to source to access decision makers and stay in-the-know.

Sponsored Recommendations

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

How Precision Motion Systems are Shaping the Future of Semiconductor Manufacturing

March 28, 2024
This article highlights the pivotal role precision motion systems play in supporting the latest semiconductor manufacturing trends.

Melles Griot® XPLAN™ CCG Lens Series

March 19, 2024
IDEX Health & Science sets a new standard with our Melles Griot® XPLAN™ CCG Lens Series fluorescence microscope imaging systems. Access superior-quality optics with off-the-shelf...

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!