Open AccessProgrammable spectral processor based on spatial polarization manipulation with liquid crystal on silicon
Author(s) -
Jianyi Xu,
Kexin Chen,
Siyi Qin,
Chen Liu,
Songnian Fu,
Deming Liu
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.014809
Subject(s) - liquid crystal on silicon , optics , polarizer , polarization (electrochemistry) , materials science , wavelength , optical filter , polarization rotator , linear polarization , liquid crystal , optoelectronics , physics , birefringence , laser , chemistry
We experimentally demonstrate a novel liquid crystal on silicon (LCoS)-based programmable spectral processor, including two cascaded photonic configurations, to realize the state of polarization (SOP) manipulation in the spatial and spectral domain. As the final SOP at each wavelength is linear polarization with a manageable polarization direction, a broadband linear polarizer is used to filter the undesired wavelengths. The polarization manipulation only needs to be implemented along the dispersion direction with a 1D-LCoS. The programmable spectral processor can experimentally reach an intensity modulation depth of 46.4 dB with less than 1 dB polarization-dependent loss (PDL). Moreover, arbitrary power spectral distribution can be obtained with around 40 dB channel isolation. In particular, our experimental results verify that the proposed setup can achieve the adjustable central wavelength and tunable filtering at a resolution of 0.08 nm.