For waveguide grating multiplexer with x=d=5.5 µm and L, 15 mm, n = 1.55. m=1, the number of channels for DBR laser with 2 1850 nm and maximum index change of 0.75% for n = 1.58 is, (a) 483 (b) 470 (c) 440 (d) 453

For waveguide grating multiplexer with x=d=5.5 µm and L, 15 mm, n = 1.55. m=1, the number of channels for DBR laser with 2 1850 nm and maximum index change of 0.75% for n = 1.58 is, (a) 483 (b) 470 (c) 440 (d) 453

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For waveguide grating multiplexer with x=d=5.5 µm and L, 15 mm, n = 1.55. m=1, the number of channels for DBR laser with 2 1850 nm and maximum index change of 0.75% for n = 1.58 is,

(a) 483

(b) 470

(d) 453

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