US 11,835,754 B2
SMF to MMF coupler
Jose M. Castro, Naperville, IL (US); Yu Huang, Orland Park, IL (US); Bulent Kose, Burr Ridge, IL (US); Richard J. Pimpinella, Frankfort, IL (US); and Asher S. Novick, New York, NY (US)
Assigned to Panduit Corp., Tinley Park, IL (US)
Appl. No. 17/270,736
Filed by Panduit Corp., Tinley Park, IL (US)
PCT Filed Sep. 4, 2019, PCT No. PCT/US2019/049496
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/086161, PCT Pub. Date Apr. 30, 2020.
Claims priority of provisional application 62/726,636, filed on Sep. 4, 2018.
Prior Publication US 2021/0181409 A1, Jun. 17, 2021
Int. Cl. G02B 6/02 (2006.01); G02B 27/00 (2006.01)
CPC G02B 6/02328 (2013.01) [G02B 27/0012 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A patch cord for transmitting between a single mode fiber (SMF) and a multi-mode fiber (MMFs) comprising;
a MMF configured to include a first core diameter;
a SMF configured to include a second core diameter, the second core diameter being less than the first core diameter; and
a photonic crystal fiber (PCF) with a hollow core spliced between the SMF and MMF, the PCF including a mode field diameter (MFD) in a range of 16 to 19 microns which is a diameter size between the first core diameter and the second core diameter;
wherein a splice coupling between the PCF and the SMF is tapered to avoid signal losses at a transition between the PCF and the SMF; and
wherein a splice coupling between the PCF to the MMF is actively aligned to minimize misalignment at a transition between the PCF and the MMF, wherein the splice coupling between the PCF and the MMF is actively aligned by maximizing an overlap integral of a fundamental mode of the PCF with a fundamental mode of the MMF while also minimizing power transmissions in non-fundamental modes within the MMF.