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We present experimental characterizations of 1D crossed Guided Mode Resonant Filters (GMRFs) in the near infrared fabricated by nanoimprint lithography. We will show that subwavelength gratings up to 4″ diameter can be fabricated using such techniques. We compare the performances of the GMRFs to the performances of Fabry-Perot filters and discuss the sensitivity to fabrication inhomogeneity of these...
We report on the design, fabrication and characterization of all-photonic-crystal, electrically-pumped, second-order DFB lasers arrays emitting around 2.4 µm. Lasers were fabricated using GaSb-based materials and optimized 2D photonic crystal waveguides geometry. Threshold in the range of 100–150 mA depending on the PhC period are measured. CW emission with high SMSRs of 35 dB are achieved. Such laser...
By harnessing the potential of photonic crystal waveguide, we have developed inherently single-mode DFB lasers that can be integrated in arrays. We propose and demonstrate two methods (affine deformation and double deformation) for fine optimization and control of both the emission wavelength and the mode discrimination of such lasers. Integrated arrays of single-mode DFB lasers on membrane emitting...
In this paper, we show with 3D FDTD simulations that the affine deformation can be efficiently combined with a waveguide deformation to achieve extremely high quality factors (Q ~ 106) for one DFB mode. A 100 time's fold increase of the Q factor is achieved between the standard W3 waveguide and the optimised deformed PhC waveguide. We also show that the Q factor is increased solely for one of the...
We have developed integrated DFB laser arrays using photonic crystal waveguide on membrane. They exhibit stable and controlled single-mode emissions with wavelength spacings as small as 0.3 nm.
We have developed integrated distributed-feedback laser arrays using photonic crystal waveguide on a membrane. They exhibit stable single-mode emission. Using both different lattice constants and a method called affine deformation of the crystal, we obtained extended control over the lasing wavelength. Laser arrays with laser-to-laser wavelength shifts as small as 0.3 nm are achieved.
A theoretically predicted concept for a monolithically integrated optical waveguide isolator is experimentally demonstrated for the first time. Preliminary non-reciprocity measurements indicate isolation ratios in the range of the design values, proving the device's potential.
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