Simple alignment technique for polarisation maintaining fibres.
We describe a simple technique for rapid alignment of input state of polarisation with respect to the preferred axis of polarisation maintaining fibres. In this technique a combination of a half-wave and a quarter-wave plate is used to turn the polarisation of incoming beam and to compensate for stress-induced perturbation of polarisation states in a laid-out fibre, respectively. The angular alignment technique is tested with temperature excursion on the fibre. The technique is easy to implement, affordable, and gives quick and accurate alignment.
Time and Frequency Division, National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India.
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Arora
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Agarwal
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Sen Gupta