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Reconfigurable Linear Chirp Control in Photonic Generation of High-Frequency Microwave Pulses
Continuous optical signal processing Microwaves
2015/6/4
A fiber-based approach for linear chirp control in optically-generated microwave pulses is proposed and demonstrated.Full linear chirp reconfigurability, including positive, negative and zero chirp ra...
Harmonic Distortion in Slow Light SOA based Microwave Photonic Phase Shifters
Fiber optics communications Fiber optics links subsystems
2015/6/4
We present a theoretical and experimental evaluation of any general order harmonic distortion in a SFL phase shifter based on CPO in a SOA and propose different optical filtering implementations for d...
Optoelectronic Generation of Millimeter-Wave White-Light at W-band with Very-Fast Sweeping Rate by Use of High-Power and Broadband Photonic Emitters
Photodiodes Radio frequency photonics
2015/6/4
By using photonic emitters and fast-scanning lasers at 1.55μm wavelengths, we generated very-flat spectra at 75-110GHz with a thirty times faster scanning-rate (35GHz/ms), much lower driving-voltage, ...
4×10 Gb/s Time and Wavelength Multicasting with NRZ to RZ Format Conversion Using Four-Wave Mixing in a Highly Nonlinear Photonic Crystal Fiber
Fiber optics communications Networks multicast
2015/6/4
We demonstrate simultaneous time and wavelength multicasting with NRZ to RZ format conversion by four-wave mixing of the input signal with a time- and wavelength-interleaved laser source. Error-free o...
High Dynamic-Range Microwave Photonic Links using Maximally Linear FIR Optical Filters
Fiber optics links subsystems Frequency modulation
2015/6/4
We propose a microwave photonic link in which maximally linear FIR optical filters discriminate frequency modulation. Using a tenth-order filter, one can achieve a 127 dBm/Hz 2/3 SFDR with 1 mW of rec...
Topology-Optimized Slow-Light Couplers for Ring-Shaped Photonic Crystal Waveguide
Integrated optics devices Photonic crystals Waveguides planar
2015/6/4
We demonstrate a topology-optimized coupler for a ring-shaped photonic crystal waveguide to improve the coupling of light located in the slow-light regime. An enhancement of the coupling efficiency of...
Electrically Tunable Bandpass Filter Based on Liquid Crystal Photonic Bandgap Fibers
Photonic crystal fibers Liquid-crystal devices
2015/6/4
An electrically tunable bandpass filter based on two photonic crystal fibers filled with different liquid crystals is demonstrated. Both the short-wavelength and long-wavelength edge are tuned individ...
Silicon-on-Insulator Ring-Shaped Photonic Crystal Waveguides for Refractive Index Sensing
Integrated optics devices Sensors Photonic crystals
2015/6/4
We present an integrated refractive index sensor based on a ring-shaped photonic crystal waveguide. We measured the shift in cut-off wavelength for different ambient refractive indices and we observed...
Highly-Birefringent Tunable Long-Period Fiber Gratings in Hollow-Core Photonic Bandgap Fiber by Use of Mechanical Pressure
Gratings Fiber optics Photonic crystal fibers
2015/6/4
The mode coupling properties of highly-birefringent tuneable LPGs formed in HC-PBGF are presented. The mode coupling from the fundamental core mode to higher-order guided mode of a HC-PBGF is obtained...
Design of single-polarization single-mode photonic crystal fiber based on index-matching coupling
Fiber design and fabrications Photonic crystal fiber
2015/6/4
We propose a new design to achieve single-polarization single-mode guidance in highly birefringent photonic crystal fiber. The suppression of unwanted polarization state is realized by introducing ind...
Curvature measurement by using low-birefringence photonic crystal fiber based Sagnac loop.
Photonic crystal fi ber Sagnac interferometer Curvature sensor
2013/5/27
An optical fi ber curvature sensor with low-birefringence photonic crystal fiber (PCF) based Sagnac loop is demonstrated experimentally. The low-birefringence PCF of about 40 cm long is inserted into ...
Simulation and design of a wideband T-shaped photonic crystal splitter
photonic crystal photonic band gap beam splitter T-junction finite difference time
2011/5/9
In this paper, a high efficiency 2-D T-shaped photonic crystal beam splitter is proposed. It consists
of a square lattice of GaAs rods (n = 3.4) embedded in air. The photonic crystal structure
propo...
Miniature refractometer based on modal interference in a hollow-core photonic crystal fiber with collapsed splicing
photonic crystal fiber modal interference refractometer collapsed splicing
2013/5/27
A miniature modal interferometer based on a hollow-core photonic crystal fiber (HC-PCF) for refractive index measurement is demonstrated. The modal interferometer is fabricated by splicing the two end...
Complete optical isolation created by indirect interband photonic transitions
optical isolation created indirect interband photonic transitions
2015/8/10
Achieving on-chip optical signal isolation is a fundamental difficulty in integrated photonics1. The need to overcome this difficulty is becoming increasingly urgent, especially with the e...
Optical isolation based on nonreciprocal phase shift induced by interband photonic transitions
Optical isolation nonreciprocal phase shift lnterband photonic transitions
2015/8/10
Photonic transitions in waveguides can create nonreciprocal phase response for counterpropagating modes. Such effect can be used in Mach–Zehnder interferometers to form optical isolators and circulato...