Phase-Modulated Carrier Systems TRIZ Cases
- Optical IQ Modulator Bias Control via Dither Difference Frequency
Distinct dither frequencies create a difference signal that filters extinction ratio noise, enabling accurate bias control with low-speed electronics.
- Rhombic-QPSK Constellation Mitigates Phase Noise in Fiber Links
Rhombic-QPSK modulation shapes signal constellations asymmetrically to mitigate phase noise from co-propagating intensity-modulated channels.