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Author: lowell howard
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1. A Differential Wavelength Meter for Laser Tuning
Published: 1/1/1997
Authors: Lowell P. Howard, Jack A Stone Jr
Abstract: A simple interferometer for matching the wavelengths of tunable lasers is described. Our interferometer uses the angular dispersion of a diffraction grating at the Littrow angle to produce a tilted wavefront with respect to a reference mirror in an o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820845

2. A Simple Technique for Observing Fringe Interpolation Errors in Michelson Interferometers
Published: 10/1/1998
Authors: Jack A Stone Jr, Lowell P. Howard
Abstract: We describe a simple, convenient method for measuring nonlinearities in displacement-measuring Michelson interferometers. Nonlinearities with a spatial periodicity of one optical fringe are a well-known source of error in precision interferometry. Ou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820913

3. Absolute Distance Interferometry with a 670-nm External Cavity Diode Laser
Published: 10/1/1999
Authors: Jack A Stone Jr, Alois Stejskal, Lowell P. Howard
Abstract: Diode lasers are becoming increasingly important in length metrology. In particular, the tunability of diode lasers makes them attractive for applications such as absolute distance interferometry (ADI). In this paper we describe the current status of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820952

4. Absolute Interferometry With a 670 nm External Cavity Diode Laser
Published: 10/1/1999
Authors: Jack A Stone Jr, Alois Stejskal, Lowell P. Howard
Abstract: In the last few years there has been much interest in the use of tunable diode lasers for absolute interferometry. Here we report on the use of an external cavity diode laser operating in the visible ({lambda}{approximately} 670 nm) for absolute dis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823111

5. Accurate Force Measurements for Miniature Mechanical Systems: A Review of Progress
Published: 9/1/1997
Authors: Lowell P. Howard, Joseph Fu
Abstract: A survey of nanonewton force calibration techniques suitable for micro-electromechanical systems (MEMS) is presented. The reviewed techniques include: mass-derived force, pendulums, calibrated master spings, resonance and electromagnetic techniques. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820844

6. Accurate Picometers for DC and Low-Frequency Displacement Measurement
Published: 4/6/2009
Authors: Jon Robert Pratt, Douglas T Smith, Lowell Howard
Abstract: We have developed a fiber-optic interferometer optimized for best performance in the frequency range from DC to 1 kHz, with displacement linearity of 1 % over a range of 25 nm, and noise-limited resolution of 2 pm [1]. The interferometer uses a tun ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902317

7. Atomic-Resolution Measurements With a New Tunable Diode Laser-Based Interferometer
Published: 1/1/2004
Authors: Richard M Silver, H Zou, S Gonda, Bradley N Damazo, Jay Shi Jun, Carsten P. Jensen, Lowell P. Howard
Abstract: We have developed a new implementation of a Michelson interferometer which has demonstrated better than 20 picometer resolution measurement capability. This new method uses a tunable diode laser as the light source with the laser wavelength continuou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=822419

8. Computer Modeling of Heterodyne Interferometer Errors
Published: 1/1/1995
Authors: Lowell P. Howard, Jack A Stone Jr
Abstract: A computer model and methodology for modeling optical mixing errors in heterodyne interferometers is presented. The model is based on the Jones calculus and uses a matrix formalism to eliminate simplifications and reduce assumptions in the model. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820741

9. Diode Lasers in Length Metrology: Application to Absolute Distance Interferometry
Published: 1/1/1999
Authors: Jack A Stone Jr, Lowell P. Howard, Alois Stejskal
Abstract: Diode lasers are becoming increasingly important in length metrology. In particular, the tunability of diode lasers makes them attractive for applications such as absolute distance interferometry (ADI). In this paper we describe the current status of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820953

10. Fabry-Perot Interferometers for Small Displacement Measurements
Published: 1/1/1996
Authors: Lowell P. Howard, Fredric Scire, Jack A Stone Jr
Abstract: A description of a Fabry-Perot interferometer for measuring small displacements is given. The instruments consists of a fiber-optic-coupled actuator and mirror guiding mechanisms, a tunable diode laser for tracking the changes in cavity length and a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820794



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