Wavelength mismatch: Bharti, Idea squabble over 900 Mhz frequencies ... Vodafone to 901.1-906.1. This way, as much as 5-6 Mhz out of the total 8 Mhz spectrum of the originally held 900 ...

The Q of the resonator was 500,000 and the free spectral range (FSR) 403 GHz (3.2 nm at a wavelength of 1.55 µm) as measured from the transmission spectrum, giving a cavity finesse of ∼ 1,000.