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We propose doubly-coupled resonator optical waveguides (D-CROWs). D-CROWs are composed by introducing 1-D photonic crystals (PC) structure into the ring resonator based CROWs. We show D-CROWs achieve small group velocity compared with conventional 1-D PC-CROWs.
The nonlinear gain suppression coefficients of GaN-based MQW LDs at high output power have been extracted from the measured optical spectra by using a self-consistent multiband Hamiltonian equations along with the density matrix formulation taking into account the strain effects and piezoelectric effects.
The reflective spectrum and the incident angle effects of double-layers AR-coating and Sub-Wavelength AR-coating on the triple-junction GaAs Solar Cell are characterized by short-circuit current (Isc), open-circuit voltage (Voc), and conversion efficiency (η).
Passive mode-locking of a Ti:sapphire laser employing monolayer graphene as saturable absorber was demonstrated for the first time. The large-area, high-quality monolayer graphene was fabricated by chemical vapor deposition method. Without any additional treatment, monolayer graphene shows ultrafast recovery time and nonlinear absorption properties appropriate for the bulk laser mode-locking near...
In this paper, we demonstrated the optical properties of grating-coupled reflection type SPR sensor which made by the commercial compact disk with the heterodyne interferometry. Based on the measurement results, the sensitivity of these two type sensors with phase measurement are higher than intensity measurement at resonance angle.
We report a laser writing system for fabrication of maskless QPM devices with violet laser diode module. Maskless QPM devices with periods 50 μm and 27 μm were successfully poled by standard electric field poling technique.
Thin films of Cuprous Oxide (Cu2O) with different deposition temperatures have been deposited on glass substrates by spray pyrolysis. The films were investigated in terms of morphological surface, structural and electrical properties exhibited p-type conduction.
Based on the physical model for three beams spectral combining, we have optimized parameters of transmitting volume Bragg gratings. It provides a doable way for the production of the volume Bragg grating.
An efficient Powell's optimization method for the design of optical multilayer thin film filters (OMTFFs) to assist fabricating the OMTFFs is presented. Many successive design and fabrication of the devices are presented in this study.
Boron doping on the structural, optical and electrical properties in BZO films fabricated by spray pyrolysis were investigated. The carrier concentration of ∼1019cm−3 and optical transmittance about 90% in the infrared region was achieved.
The solely effect of the radiation from optical Yagi-Uda antenna is investigated via total field scattered field method. Near and far field profiles indicate its directional radiation and directivity of 7.5 is obtained.
All optical interleave of multi-level modulated signal with reference light is experimentally demonstrated with 4 Gbaud BPSK and QPSK signal formats. The generated interleaved signals are successfully demodulated by self-homodyne detection using optical delay interferometer.
Raman-amplified four-wave mixing in optical fibers with polarization mode dispersion was found to be suppressed or enhanced at dip positions, which was affected by the relative position between two signal wavelengths and the zero-dispersion wavelength.
We use a method for calculating optical characteristics of multilayer structures with the incidence light which has a finite coherence length and study the effect of the coherence length on the absorption of solar cells.
The electrooptic effect in reverse-proton-exchanged waveguides on X-cut LiNbO3 was evaluated. It was found that the conditions of the initial proton exchange process are important for obtaining an electrooptic constant closer to the bulk value.
The optical characteristics of LTCeYDG applied to high-power PCWLEDs are demonstrated. The LTG powder exhibited a lower transition temperature about 567°C. The 4-wt% LTCeYDG, distribution uniformity and quantum efficiency were measured 85% and 34.5%, respectively.
We synthesized 2,2′,7,7′-tetrapyren-1-yl-9,9′-spirobi-fluorene (TPSBF), a deep blue emitter featuring four identical emitting pyrene units linked around a stable spirobifluorene core. The TPSBF exhibits a high fluorescence yield, extreme thermal stability and a high glass transition temperature. The tetrahedral nature of the carbon atom at the spiro center preserves the optical and electrochemical...
Crosstalk in multi-core fibers with α-index single-mode cores is investigated theoretically. It is clarified that the index parameter α of the core has a great effect on the crosstalk of multi-core fibers.
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