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Shai Berger has written:
'Strain sensing with a laser diode tuned by a fiber bragg grating'
Laurie Chappell has written:
'Development of a tunable laser based bragg grating demodulation system'
what is meant by grating
Grating constant is the distance between two rulings present on the grating plate.
Metal grating will generally be more durable and trouble free. I would not suggest fiberglass for a good grating material.