Edwin Jan Klein - Universiteit Twente

3.2.7 Design parameter summary
49
Design
In Table 3.1 the parameters discussed in the previous paragraphs and the requirements
they place on the roundtrip losses αr and coupling κ have been summarized.
Table 3.1. Parameter design rules for a micro-resonator used in telecom applications.
Parameter αr κ
ILDrop low medium to high
PTRes low medium to high
∆λFWHM not so important κ high enough to obtain
desired bandwidth
CT low to medium low
ILThrough not important low
SRR low low to medium
In practice a balance will have to be found between the requirements of the three
upper and the three lower parameters in this table. In most applications the lower limit
of κ will be set by the bandwidth requirement while the upper limit is set by the SRR or
the CT. For the micro-resonators used in the following chapters this range is often
between 0.4 and 0.6. A good maximum target for the roundtrip losses in this range is
then ≈0.06 dB (about 2 dB/cm for a resonator with a 50 µm radius).