We
have also demonstrated theoretically and experimentally that erbiumdoped
waveguide optical amplifiers (EDWAs) offer fast transient
recovery time owing to short photon cavity lifetime [4, 6]. In addition
we have shown that a short-cavity OGC-OA strongly reduces the extra
pump power required for OGC and thus the overall component
fabrication and operation cost. However, fully integrated-component
design based on waveguide amplifiers may need further technological
development.