# Mode-Selective Photonic Lanterns for Orbital Angular Momentum Mode Division Multiplexing
); [EMAIL_ADDRESS] (X.H. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [PERSON]IL_ADDRESS]du.cn (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [PERSON]EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [PERSON]IL_ADDRESS]du.cn (H.G.) [PERSON]  
1 State Key Laboratory of Optical Fibre and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430074, China; [EMAIL_ADDRESS] (C.Y. ); [EMAIL_ADDRESS] (W.T.) [PERSON]  
1 State Key Laboratory of Optical Fibre and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430074, China; [EMAIL_ADDRESS] (C.Y. ); [EMAIL_ADDRESS] (W.T.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [PERSON]L_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [PERSON]IL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (X.H. ); [PERSON]DDRESS] (Y.Z. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Y.L. ); [EMAIL_ADDRESS] (L.F.); [EMAIL_ADDRESS] (W.L. ); [EMAIL_ADDRESS] (J.Q. ); [EMAIL_ADDRESS] (H.G.) [PERSON]  
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing University of Posts and Telecommunications, Beijing 100876, China; [EMAIL_ADDRESS] (Ytwo input SMF ports of a MSPL to generate one OAM mode. We have previously proposed a one-port excited all-fiber OAM multiplexer based on cascading a MSPL and a mode-polarization controller [12], but the mode-polarization controller introduces instability and additional complexity. In this paper, we analyze the periodic evolution of the PL output modes with respect to taper lengths, affected by possible mode phase differences varying along the taper. Then, we design a three-mode orbital angular momentum mode-selective photonic lantern (OAM-MSPL) utilizing the phase difference caused by the mode degeneracy breaking along a specific area of the taper. The OAM\({}_{0}\), OAM\({}_{-1}\), and OAM\({}_{+1}\) can be excited respectively when selectively and separately injecting light into the three SMF cores. Simulation results show that the mode crosstalk of the OAM-MSPL is below \(-24\) dB.