US 12,271,069 B2
Dual-polarization rotationally-insensitive monostatic transceiver with dual cladding fiber
Andrew M. Kowalevicz, Arlington, VA (US)
Assigned to Raytheon Company, Arlington, VA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Sep. 20, 2022, as Appl. No. 17/933,779.
Claims priority of provisional application 63/246,676, filed on Sep. 21, 2021.
Claims priority of provisional application 63/246,648, filed on Sep. 21, 2021.
Claims priority of provisional application 63/246,693, filed on Sep. 21, 2021.
Prior Publication US 2023/0085835 A1, Mar. 23, 2023
Int. Cl. G02F 1/09 (2006.01); G02B 6/036 (2006.01); G02B 6/27 (2006.01); G02B 27/28 (2006.01); H04B 10/112 (2013.01); H04B 10/61 (2013.01)
CPC G02F 1/093 (2013.01) [G02B 6/03622 (2013.01); G02B 6/2746 (2013.01); G02B 6/2766 (2013.01); G02B 27/283 (2013.01); H04B 10/1125 (2013.01); H04B 10/614 (2013.01); G02F 1/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
multiple dual cladding waveguides each comprising (i) a single-mode interior section configured to transport one of multiple outgoing optical signals and (ii) a multimode section that at least partially surrounds the interior section and that is configured to transport one of multiple incoming optical signals, wherein different outgoing optical signals have different polarizations and different incoming optical signals have different polarizations;
a feedback loop; and
a polarization beamsplitter configured to:
(i) combine the multiple outgoing optical signals to produce transmit optical signals;
(ii) separate receive optical signals to produce the multiple incoming optical signals;
(iii) isolate incorrectly-polarized light of at least one of the multiple outgoing optical signals; and
(iv) direct the incorrectly-polarized light to the feedback loop;
wherein the feedback loop is configured to remove power to the incorrectly-polarized light of the at least one of the multiple outgoing optical signals.