Abstract

Optical networks based on multiple wavelengths for transport and routing are drawing attention not only among research laboratories, but also within operating companies and standardization committees.¹ Wavelength referencing is becoming mandatory, particularly in the case of high-density channel-allocation schemes with wavelength spacing of the order of a few times the bit rate. A reliable, stable, and reproducible absolute reference is thus required.²

© 1995 Optical Society of America