US 7,321,605 B2
Helical optical pulse stretcher
Michael M. Albert, Stamford, Conn. (US)
Assigned to ASML Holding, N.V., Veldhoven (Netherlands)
Filed on May 24, 2004, as Appl. No. 10/851,247.
Prior Publication US 2005/0259701 A1, Nov. 24, 2005
Int. Cl. H01S 3/10 (2006.01); H01S 3/13 (2006.01); G03B 27/54 (2006.01)
U.S. Cl. 372—30  [372/25; 372/700; 355/67] 11 Claims
OG exemplary drawing
 
1. A pulse stretcher comprising:
a single pass pulse stretcher; and
a first prism and a second prism arranged on either side of the single pass pulse stretcher,
wherein a beam enters the single pass stretcher and is reflected in a helical path using the first and second prisms for multiple passes through the single pass pulse stretcher.