Tc. Lee et al., COMPARISON OF PROPAGATION LOSS OF SINE-GENERATED AND CONSTANT RADIUS S-BENDS IN AL(GA)AS WAVE-GUIDES, Journal of applied physics, 74(1), 1993, pp. 730-731
Constant radius and sine-generated S bends were fabricated from double
heterostructure Al(Ga)As waveguides. No significant difference in the
loss characteristics between the two structures was observed. These r
esults are within the bounds of our beam propagation method calculatio
n.