TY - GEN
T1 - Measuring the angular emission of optical vortex beams from integrated devices
AU - Chen, Lifeng
AU - Zhu, Jiangbo
AU - Strain, Michael J.
AU - Meriggi, Laura
AU - Garcia, Martin L.
AU - Cicek, Kenan
AU - Li, Huanlu
AU - Cai, Xinlun
AU - Sorel, Marc
AU - Yu, Siyuan
PY - 2014/11/18
Y1 - 2014/11/18
N2 - Orbital angular momentum (OAM) represents an additional degree of freedom of a light beam, to be added to the standard ones (e.g. polarization, wavelength) [1-2]. Previously, we have demonstrated an integrated device for OAM generation, in which the Whispering Gallery mode (WGM) of the micro-ring resonator to a propagating OAM mode by using an angular grating embedded within the resonator structure [3]. This integrated approach allows compact device footprint and OAM mode order selectivity with injection wavelength, which is highly desirable for telecommunications systems. To bring OAM closer to actual system implementations, several groups around the world are working on the development of optical fibres for propagation of multiplexed OAM modes. In order to achieve efficient coupling between OAM beams and OAM fibres, it is important to obtain the information of the divergence angle of the OAM beams which should be compatible with the N.A. of the fibres. In this work, we use Fourier image inspection [4] of the emission of the device to analyse the divergence angles of the OAM beams, as shown in Fig.1.
AB - Orbital angular momentum (OAM) represents an additional degree of freedom of a light beam, to be added to the standard ones (e.g. polarization, wavelength) [1-2]. Previously, we have demonstrated an integrated device for OAM generation, in which the Whispering Gallery mode (WGM) of the micro-ring resonator to a propagating OAM mode by using an angular grating embedded within the resonator structure [3]. This integrated approach allows compact device footprint and OAM mode order selectivity with injection wavelength, which is highly desirable for telecommunications systems. To bring OAM closer to actual system implementations, several groups around the world are working on the development of optical fibres for propagation of multiplexed OAM modes. In order to achieve efficient coupling between OAM beams and OAM fibres, it is important to obtain the information of the divergence angle of the OAM beams which should be compatible with the N.A. of the fibres. In this work, we use Fourier image inspection [4] of the emission of the device to analyse the divergence angles of the OAM beams, as shown in Fig.1.
U2 - 10.1109/Group4.2014.6961985
DO - 10.1109/Group4.2014.6961985
M3 - Conference contribution
AN - SCOPUS:84914167690
T3 - IEEE International Conference on Group IV Photonics GFP
SP - 191
EP - 192
BT - IEEE International Conference on Group IV Photonics GFP
PB - IEEE
T2 - 11th International Conference on Group IV Photonics, GFP 2014
Y2 - 27 August 2014 through 29 August 2014
ER -