14 July 1995 Promise of diamond optics
Author Affiliations +
Abstract
The development of processes for depositing diamond in large sizes offers the promise of optics with a combination of intrinsic superior properties. These properties include optical transmission over a large wavelength range due to a wide electronic bandgap and forbidden first order phonon induced absorption, the ability to withstand high laser powers due to high optical transmissivity and high thermal conductivity, and great mechanical strength due to large elastic moduli. Polycrystalline diamond of high optical quality can now be produced by various enhanced chemical vapor deposition (CVD) techniques in sizes many cm in diameter and in thickness of the order of one mm. Key to the use of diamond as an optical material is our ability to evaluate the defects that influence the properties. A variety of techniques are used to investigate the defect content. These include optical absorption spectroscopy, Raman spectroscopy, transmission electron microscopy, electronic carrier lifetime, and thermal conductivity. Use of CVD diamond in an aircraft environment of rain and sand erosion is currently limited by the strength of the material which is in the range 200 to 400 MPa. Despite its lower than expected strength, diamond has excellent resistance to thermal shock. Even if all of the technical limitations for producing high quality CVD diamond for optical applications are overcome, the cost of production is still very high; large scale use will require a significant drop in price. A particular impediment is the high cost of polishing diamond.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Albert Feldman, Daniel C. Harris, "Promise of diamond optics", Proc. SPIE 2428, Laser-Induced Damage in Optical Materials: 1994, (14 July 1995); doi: 10.1117/12.213703; https://doi.org/10.1117/12.213703
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT

Properties of CVD diamond for optical applications
Proceedings of SPIE (December 01 1991)
CVD Diamond For IR Applications
Proceedings of SPIE (September 11 1989)
Critical-point phonons of diamond
Proceedings of SPIE (December 01 1991)
Optical properties of boron-doped diamond films
Proceedings of SPIE (November 20 1992)
Raman and Brillouin scattering in diamond
Proceedings of SPIE (December 01 1990)
Diamond windows for infrared and multispectral applications
Proceedings of SPIE (October 26 1998)

Back to Top