Linearized Phase Modulated Analog Optical Links

A receiver for demodulating phase modulated analog optical signals, comprising:

• a splitter for splitting said phase modulated analog optical signals into a first and a second parallel optical paths;
• said first optical path having an asymmetrical interferometer with a first time delay, and a first photodiode optically connected to an output of the first interferometer;
• said second optical path having a second asymmetrical interferometer having a second time delay, and a second photodiode optically connected to an output of the second interferometer;
• and
• a 180 degree hybrid coupler arranged to receive the outputs of the first and the second photodiodes and to generate a demodulated signal,
• wherein said first time delay is not equal to said second time delay.

A receiver for demodulating phase modulated analog optical signals, comprising:

• a splitter for splitting said phase modulated analog optical signals into a first and a second parallel optical paths at unequal power levels;
• said first optical path having an asymmetrical interferometer with a first time delay;
• said second optical path having a second asymmetrical interferometer having a second time delay;
• and
• a balanced photodetector including at least two photodiodes, a first of the two photodiodes arranged to receive the output of the first interferometer and the second of the two photodiodes arranged to receive the output of the second interferometer, the receiver demodulating the phase modulated analog optical signal, wherein said first time delay is not equal to said second time delay.