Reply To: frequency separation in dual tone optical signal

[alistuParticipant]

Hi Dhiman,

Since the signal has not passed through the fiber yet, dispersion or other channel impairments do not affect the optical spectrum. I reduced the laser linewidth to 0.1 MHz (which is quite consistent with the commercially available low power lasers), and I believe the spectrum got obviously better. Please see if that is acceptable.

Regards