US 12,468,091 B2
System for integrated photonic notch filter
Bryan Park, Campbell, CA (US); Koustuban Ravi, Oakland, CA (US); Eric Dudley, Sacramento, CA (US); Mihai Dorian Vidrighin, Palo Alto, CA (US); and Mehdi Jadidi, San Mateo, CA (US)
Assigned to Psiquantum, Corp., Palo Alto, CA (US)
Filed by Psiquantum, Corp., Palo Alto, CA (US)
Filed on Mar. 16, 2023, as Appl. No. 18/122,392.
Prior Publication US 2024/0310582 A1, Sep. 19, 2024
Int. Cl. G02B 6/293 (2006.01); G02B 6/12 (2006.01); G02F 1/35 (2006.01)
CPC G02B 6/29355 (2013.01) [G02B 6/29389 (2013.01); G02B 2006/12109 (2013.01); G02F 1/3536 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A notch filter circuit comprising:
a wavelength demultiplexer;
a first pump rejection filter coupled to the wavelength demultiplexer;
a second pump rejection filter coupled to the wavelength demultiplexer;
a first notch filter arm coupled to the first pump rejection filter and including a first chain of asymmetric Mach-Zehnder interferometers (MZIs); and
a second notch filter arm coupled to the second pump rejection filter and including a second chain of asymmetric MZIs.