Radiation coupling arrangements with free electron removal

摘要

PCT No. PCT/GB95/00889 Sec. 371 Date Aug. 1, 1996 Sec. 102(e) Date Aug. 1, 1996 PCT Filed Apr. 20, 1995 PCT Pub. No. WO95/29417 PCT Pub. Date Nov. 2, 1995An optical apparatus including a laser producing in use an output laser beam and an optical guide for guiding radiation of the output laser beam when incident thereon and characterised by means for depleting of free charge carriers a region in a path to be traversed by the output laser beam between the laser and the guide.