US 11,789,149 B2
Polarization separation in remote imaging systems
Prakash Koonath, La Crescenta, CA (US); Shuren Hu, Arcadia, CA (US); Mehdi Asghari, La Canada Flintridge, CA (US); Bradley Jonathan Luff, La Canada Flintridge, CA (US); and Behnam Behroozpour, South San Francisco, CA (US)
Assigned to SiLC Technologies, Inc., Monrovia, CA (US)
Filed by SiLC Technologies, Inc., Monrovia, CA (US)
Filed on Oct. 4, 2020, as Appl. No. 17/62,618.
Prior Publication US 2022/0107411 A1, Apr. 7, 2022
Int. Cl. G01C 3/08 (2006.01); G01S 17/32 (2020.01); G02F 1/01 (2006.01); G01S 7/481 (2006.01); G01S 7/499 (2006.01); G02B 6/28 (2006.01); G02B 6/27 (2006.01); G02B 6/12 (2006.01)
CPC G01S 17/32 (2013.01) [G01S 7/481 (2013.01); G01S 7/4817 (2013.01); G01S 7/499 (2013.01); G02B 6/12004 (2013.01); G02B 6/2773 (2013.01); G02B 6/2813 (2013.01); G02F 1/0136 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electro-optical system for polarization separation, the system comprising:
a laser configured to generate an output signal;
a polarization rotator configured to:
receive the output signal;
generate a transverse electric (TE) signal associated with the output signal; and
generate a transverse magnetic (TM) signal associated with the output signal;
a first birefringent crystal configured to:
receive the TE signal and the TM signal associated with the output signal; transmit the TE signal at a first angle of refraction; and
transmit the TM signal at a second angle of refraction;
a second birefringent crystal configured to:
receive at least one input signal; and
generate, based on the at least one input signal, a first polarized portion and a second polarized portion of the at least one input signal; and
a photonic integrated circuit (PIC) configured to:
receive, from the first birefringent crystal, the TE signal associated with the output signal;
receive, from the first birefringent crystal, the TM signal associated with the output signal;
receive, from the second birefringent crystal and via a first input waveguide, the TE
portion of the at least one input signal; and
receive, from the second birefringent crystal and via a second input waveguide, the TM portion of the at least one input signal.