A new type of multiple-reflection optical cell is presented. One of the main advantages of this type of cell is that it can be made of standard mirrors without particular tolerance while allowing a great number of reflections and thus a large optical path, only limited by the reflection coefficient of the mirrors. The configuration is simple, compact, stable, and cheap. This cell consists of three mirrors as in a White cell but its principle is different. It behaves as a multiplier of a Herriott cell from which it inherits the opto-mechanical stability qualities. The Herriott cell and the White cell are two particular cases of this type of cell. As examples, a demonstrator and an absorption cell contained in a volume of 5 l are presented. The first device is usable with a laser in visible light. The second device is usable with an infrared laser diode for the detection of atmospheric trace species.
© 2007 Optical Society of America
Original Manuscript: December 1, 2006
Revised Manuscript: May 2, 2007
Manuscript Accepted: May 4, 2007
Published: July 23, 2007
Claude Robert, "Simple, stable, and compact multiple-reflection optical cell for very long optical paths," Appl. Opt. 46, 5408-5418 (2007)