Abstract
A long-period waveguide grating (LPWG) was demonstrated in a low-loss negative tone UV-sensitive epoxy novolak resin polymer. The grating structure was fabricated on top of the waveguide using a standard UV lithography process, and no other subsequent process is required after the development step. It is shown that with an appropriate design of the structure a transmission peak at the desired wavelength can be achieved. The LPWG exhibits an attenuation of -18 dB using a grating length of 17 mm. The temperature sensitivity of the LPWG is linear and is found to be ∼0.89 nm/°C. A red shift of the transmission peak wavelength was also observed and is discussed.
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42.70.Jk; 42.79.Dj; 42.79.Gn
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Tang, H., Wong, W. & Pun, E. Long period polymer waveguide grating device with positive temperature sensitivity. Appl. Phys. B 79, 95–98 (2004). https://doi.org/10.1007/s00340-004-1489-3
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DOI: https://doi.org/10.1007/s00340-004-1489-3