title: Groove depth determination using a laser for sinusoidal groove gratings.
abstract: We describe a technique for determining the groove depth of gratings having sinusoidal grooves. Absolute efficiencies measured using a laser are compared with numerical results to give an indication of groove depth.
authors.forename: I J
authors.initials: IJ
authors.lastname: Wilson
authors.forename: L C
authors.initials: LC
authors.lastname: Botten