Highlights of Next Issue

Feature Articles September/October 2009

A Tunable Fabry-Perot-Interferometer for 3 - 4.5 µm Wavelength with Bulk Micromachined Reflector Carrier: Part I of a Two Part Series
An FPI design driven by the need for a tunable filter in wavelength division multiplexing in gas analysis in the near infrared and in optical communications. This article deals with the design, fabrication and test of a micro-machined first order Fabry-Perot Interferometer (FPI) that is intended for use as a tunable infrared (IR) filter in many applications, including IR spectrometers.

Gases 101: European and US Occupational Exposure Limits
Discusses UK COSHH regulations and EH40, and USA ACGIH, OSHA, and NIOSH agency standards.

Nitrogen and Hydrogen as Alternate Carrier Gases for GC/MS
While nitrogen and hydrogen can be used as alternate carrier gases for GC/MS, there are unique challenges that must be addressed when trying to duplicate the performance of helium.