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nEUCLID: a new homodyne interferometer with space applications

Bradshaw, Miranda (2015)
Ph.D. thesis, University of Birmingham.

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Abstract

The objective of this project was to design a low-mass, low-power interferometer to be used for space applications. It had to be capable of remaining tilt-immune whilst working at a distance of at least 1 m.

This thesis describes the design and subsequent building of a 1550 run homodyne interferometer. Known as nEUCLID, it has a working distance of 660 mm and a working range of± 120 mm. These large distances are made possible by the novel cat's eye design within the interferometer, which also allows tilt immunity of± 0.35° of the target mirror (at the sweet plane). The thesis explains in detail the theory and design of the cat's eye, known as a PCE in the text.

The interferometer, nEUCLID, has a sensitivity of 420 pm/√Hz, at 1 Hz in air, tested at the working distance of the current design. It has a mass of 2 kg and an overall power of 1.8 W. Both of these values are due to using standard, off-the-shelf components in the design, and could be reduced with further development.

Within this thesis ground-based and space-based applications for nEUCLID within the space industry are discussed and compared with existing technologies.

Type of Work:Ph.D. thesis.
Supervisor(s):Speake, Clive C.
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Physics and Astronomy
Additional Information:

Publication resulting from research:

Speake, Clive C., and Miranda J. Bradshaw. "Pseudo-cat’s eye for improved tilt-immune interferometry." Applied optics 54.24 (2015): 7387-7395. http://dx.doi.org/10.1364/AO.54.007387

Subjects:QC Physics
Institution:University of Birmingham
ID Code:6355
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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