A5056975244- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Terahertz technology and applications
- Spectroscopy and Laser Applications
- Photonic Crystal and Fiber Optics
- Laser Design and Applications
- Semiconductor Quantum Structures and Devices
- Millimeter-Wave Propagation and Modeling
- PAPR reduction in OFDM
- Laser Material Processing Techniques
- Semiconductor materials and devices
- Power Line Communications and Noise
- Advanced Optical Sensing Technologies
- Advanced Electrical Measurement Techniques
- Laser and Thermal Forming Techniques
- Advanced Power Amplifier Design
- Cancer Treatment and Pharmacology
- Microwave Engineering and Waveguides
- Optical and Acousto-Optic Technologies
- Advanced Signal Processing Techniques
- Advanced Adaptive Filtering Techniques
Institut polytechnique de Grenoble
2011-2024
Université Savoie Mont Blanc
2018-2024
Université Grenoble Alpes
2009-2023
Institut de Microélectronique, Electromagnétisme et Photonique
2013-2023
Centre National de la Recherche Scientifique
2004-2023
Los Angeles Harbor College
2012-2013
Micro and Nanotechnology Innovation Centre
2009
Fonctions Optiques pour les Technologies de l’information
2004-2008
University of Pavia
2007
Université de Rennes
2004
The millimeter-wave (mm-wave) frequency band has emerged as a means to overcome current radio spectral limitations and represents an interesting solution fulfill the bandwidth networking requirements of fifth generation (5G) mobile communications beyond. Photonic these frequencies holds advantages over electronic methods in terms cost effective network distribution. Due their coherent nature, optical combs (OFC) are promising for efficient mm-wave frequencies. work outlined examines use OFCs...
Optical heterodyne analog radio-over-fiber (A-RoF) links provide an efficient solution for future millimeter wave (mm-wave) wireless systems. The phase noise of the photo-generated mm-wave carrier limits performance such links, especially, transmission low subcarrier baud rate multi-carrier signals. In this work, we present three different techniques compensation laser frequency offset (FO) and (PN) in optical A-RoF system. first approach advocates use receiver; second uses standard digital...
Chromatic dispersion is a limiting factor in intensity-modulated radio-over-fiber links with direct detection. This paper investigates its influence on single-mode fiber based mode-locked laser sources through simulation and experiment. A time-based approach used to describe the impact of chromatic after transmission across link. The simulations presented herein give hints for design dedicated lasers that can later serve dispersion-tolerant networks. findings are experimentally validated...
This paper investigates a 60-GHz radio-over-fiber (RoF) communication system employing two different techniques to generate millimeter-wave (mm-wave) signals. The relative intensity noise (RIN) transferred during optical heterodyning of mm-wave signal is theoretically studied and experimentally investigated. Laser RIN induces at resultant electrical directly generated from initial low frequency. Therefore, impairs the performance RoF system. model also presented in very close agreement with...
In this paper, a radio-over-fiber (RoF) communication system at 60 GHz based on passively mode-locked laser diode (PMLLD) is presented and the performance of different electrical down-conversion methods (coherent non-coherent down-conversion) for studied. Impact PMLLD phase noise error vector magnitude (EVM) also observed complete theory experimental survey using (envelope detector) to reduce caused by instability provided. The envelope detector down-convert signal with OOK modulation in eye...
Strict optical linewidth/coherence requirements for A-RoF systems are overcome through development of an analog heterodyne architecture tolerant to phase noise and carrier offset.Successful generation reception a 60GHz UF-OFDM signal using two free-running tunable lasers, without digital phase/frequency offset compensation, is demonstrated.
In this paper, a complete theoretical and experimental study of amplitude noise impact on performance radio-over-fiber (RoF) communication system in millimeter-wave (MMW) frequency band is presented. A simulation method also presented, using which one can determine the origin has most error vector magnitude (EVM). This based analyzing trends EVM versus received optical power. The different electrical such as relative intensity noise, shot thermal precisely studied employing analysis....
Radio-over-fiber systems can be harnessed to generate millimeter-wave (mm-wave) frequencies, but the optical impairments such as noise, chromatic dispersion, and nonlinearity degrade quality of generated heterodyne signals. When frequency comb sources are employed, dispersion has a main importance since it causes phase shift decorrelation between lines. These both effects subsequently induce power fading also noise on beat note carrier. With utilizing ultrawide spectra, higher order...
This paper examines the impact of laser mode partition noise (LMPN) during optical heterodyning process. The system presented here employs a passively mode-locked diode (PMLLD) as multimode source for millimeter-wave (mm-wave) generation. A comprehensive theoretical and experimental study LMPN at low frequency and, first time, in mm-wave band is demonstrated. Simulations are to investigate distribution across modes. appears an impairment performance on radio-over-fiber (RoF) communication by...
Integrated solid-state lasers have the advantage of offering narrow linewidth, well below MHz range, making them ideal for various applications, from sensing to telecommunication. High coherence free-running are difficult characterize, due combination a reduced linewidth with potential frequency drift. Conventional techniques such as optical self-heterodyning solutions require decorrelation lengths several hundreds km, and standard RF phase noise measurements not compatible slow varying...
Simulation and experimental measurements are presented for 60 GHz transmission systems based on upconversion. We demonstrate that chirp in modulated semiconductor lasers combined with upconversion allows to realize a simple system resistant chromatic dispersion without the need customized filter. The comparison between two modulation schemes highlights possibility reduce power fading, due dispersion, value as low optical fiber attenuation.
Round-robin measurements on the linewidth enhancement factor are carried out within several laboratories participating to EU COST 288 action. The α–factor is measured by applying up 7 different techniques. obtained results compared.
In this article, analog fiber optic links (radio-over-fiber, RoF, links) are presented as a flexible, low-cost solution for in-house distribution of millimeter-wave (mmw) signals. Mode-locked laser diodes (MLLD) serve inexpensive mmw sources the downlink signals across an optical link. We compare robustness direct and external RF modulation such MLLD-based RoF systems, whereas error vector magnitude (EVM) received symbols serves figure merit. On eve 60 GHz WLAN standardization, we...
Relative intensity noise of a six-channel multiwavelength distributed Fabry-Perot fibre laser is compared to the singlemode feedback laser. The characteristics individual channels are similar that laser, offering low-cost and compact solution for wavelength multiplexing applications without penalty.
We demonstrate a stabilization and tuning architecture that enables the transmission of stable modulation sideband in presence high carrier instability. The technique can be used radio-over-fiber (RoF) systems employing optical intensity modulation, links featuring generation, which might exhibit considerable phase noise or even frequency drift. concept is validated experimentally two based on different laser structures. results this paper represent first demonstration, to our knowledge, RoF...
In this letter, a method based on time sampling and signal processing is proposed to measure the phase noise of any unstable optically generated carrier. We could overcome difficulties measuring passively mode-locked laser output with 60-GHz repetition frequency due instability by replacing spectrum analyzer digital storage oscilloscope, which samples in domain. A mathematical approach demodulation used separate amplitude measurements. The precision has been validated comparing measured...
A sensitive technique to measure the relative intensity noise of a laser is described. Such experiment useful tool for characterizations, allowing direct measurement physical parameters like relaxation oscillation frequencies and damping factor. Examples determination such are given.
A 100 GHz radio over fiber (RoF) system based on two free running distributed feed back (DFB) lasers at the transmitter and a non-coherent receiver is proposed experimentally demonstrated. Different modulation techniques such as QPSK, 16QAM OOK for data rate of more than 1 Gbps have been demonstrated this RoF system. At central station, one modes intensity modulated using external modulator then propagate through single mode to base station. The millimeter wave produced by heterodyning...
Optical processing of radiofrequency signals is demonstrated in this communication using photoswitches made from nitrogen ion implanted InGaAs. The sampling device shows an ultrafast picosecond response time while activated by ultra-short optical pulses or modulated beam centered at the wavelength 1.55 μm. optoelectronic embedded a microwave coplanar waveguide which has high electrical bandwidth allowing to process 1-67 GHz band. We investigate potentiality component be used either photonic...
Terahertz applications have been extensively studied during the last decade since they allow not only increasing bandwidth of telecom systems but also detection many organic molecules in solid and liquid phase, including hazardous materials such as explosives. In this contribution, we present a device that allows generating frequencies domain through heterodyning signals emitted by two distributed feedback lasers made ion exchange on erbium-ytterbium co-doped glass. Thanks to intrinsic...
We demonstrate a novel technique ensuring the transmission of stable sidebands in presence increased carrier phase noise. This is particular interest communication systems where oscillators providing signal cannot be stabilized by conventional phase-locked loop, such as radio-over-fiber links relying on optical LO generation techniques.
In this paper, a method is proposed to reduce the sensitivity chromatic dispersion over fiber optic link based on mode-locked lasers for Millimeter Waves (MMW) generation and transmission. The simulation presented here gives an estimation of length margin available radio-over-fiber networks with minimal maximum received MMW power. results are verified experimentally by means 60 GHz laser system combined unbalanced Mach Zehnder interferometer compensation impact effects transmitted power range.
In this letter, we study and demonstrate, for the first time, how chromatic dispersion causes laser mode partition noise at millimeter-wave (mm-wave) frequencies. A 60-GHz radio-over-fiber (RoF) transmission system employing an optical frequency comb is theoretically experimentally investigated. Chromatic a limiting factor in RoF systems, which induces power fading phase on resultant mm-wave beating carriers. Furthermore, experimental measurements letter show that when transmitting spectrum...
In this Letter, the impact of thermal coupling between two glass laser cavities on a heterodyned signal for millimeter-wave frequency generation is presented. addition to narrow heterodyne linewidth estimated be lower than 1 kHz, drift reduced ±16.5 ppm/7 s. The quality also evaluated by performing data transmission, respecting communication standards at 60 GHz using complex modulation formats.