A. Ramdane
YOU?
Author Swipe
View article: Hybrid optical feedback architecture for improved performance of QDash comb laser
Hybrid optical feedback architecture for improved performance of QDash comb laser Open
We propose and demonstrate a technique based on self-injection locking to significantly enhance the performance of a quantum-dash comb laser, implemented via a hybrid architecture that combines fiber-based and free-space elements. Packaged…
View article: Strong Laser Emission Modulation by Coherent Perfect Absorption Inside Complex‐Coupled Distributed Feedback Laser Diodes
Strong Laser Emission Modulation by Coherent Perfect Absorption Inside Complex‐Coupled Distributed Feedback Laser Diodes Open
The proof‐of‐concept of the exploitation of Coherent Perfect Absorption (CPA) in electrically‐injected distributed‐feedback laser sources is reported. Capitalizing on the essence of CPA as “light extinction by light”, an integrated laser‐m…
View article: Electrically Injected Metamaterial Grating DFB Laser Exploiting an Ultra‐High Q Electromagnetic Induced Transparency Resonance for Spectral Selection
Electrically Injected Metamaterial Grating DFB Laser Exploiting an Ultra‐High Q Electromagnetic Induced Transparency Resonance for Spectral Selection Open
The study shows that, in waveguide (WG) configuration, the coupling of a 2D plasmonic metamaterial grating (MMG) having a conventional Bragg period along the guide but a distinct period along the transverse axis can lead to Electromagnetic…
View article: Noise-induced broadening of a quantum-dash laser optical frequency comb
Noise-induced broadening of a quantum-dash laser optical frequency comb Open
Single-section quantum dash semiconductor lasers have attracted much attention as an integrated and simple platform for the generation of THz-wide and flat optical frequency combs in the telecom C-band. In this work, we present an experime…
View article: Electrically injected first-order gratings broken Parity-Time symmetry DFB lasers: insight on device design rules and experimental results
Electrically injected first-order gratings broken Parity-Time symmetry DFB lasers: insight on device design rules and experimental results Open
International audience
View article: Colorless Coherent TDM-PON Based on a Frequency-Comb Laser
Colorless Coherent TDM-PON Based on a Frequency-Comb Laser Open
Coherent reception becomes an interesting option when data rates in time-division-multiplexed (TDM) passive optical networks (PONs) grow beyond 50 Gbit/s. Controlling the wavelength, i.e., the optical frequency, and the phase of the laser …
View article: Coupling of nanoantennas in loss-gain environment for application in active tunable metasurfaces
Coupling of nanoantennas in loss-gain environment for application in active tunable metasurfaces Open
International audience
View article: Electrically injected parity-time symmetric distributed feedback laser diodes (DFB) for telecom applications
Electrically injected parity-time symmetric distributed feedback laser diodes (DFB) for telecom applications Open
The new paradigm of parity-time symmetry in quantum mechanics has readily been applied in the field of optics with numerous demonstrations of exotic properties in photonic systems. In this work, we report on the implementation of single fr…
View article: Optical Heterodyne Analog Radio-Over-Fiber Link for Millimeter-Wave Wireless Systems
Optical Heterodyne Analog Radio-Over-Fiber Link for Millimeter-Wave Wireless Systems Open
International audience
View article: 56 Gb/s/λ over 1.3 THz frequency range and 400G DWDM PAM-4 transmission with a single quantum dash mode-locked laser source
56 Gb/s/λ over 1.3 THz frequency range and 400G DWDM PAM-4 transmission with a single quantum dash mode-locked laser source Open
The continued evolution of high capacity data center interconnects (DCI) requires scalable transceiver design. The Gigabit Ethernet (GbE) family of standards targets cost-effective and increased capacity transmission through the use of coa…
View article: 32QAM WDM transmission at 12 Tbit/s using a quantum-dash mode-locked laser diode (QD-MLLD) with external-cavity feedback
32QAM WDM transmission at 12 Tbit/s using a quantum-dash mode-locked laser diode (QD-MLLD) with external-cavity feedback Open
Chip-scale frequency comb generators lend themselves as multi-wavelength light sources in highly scalable wavelength-division multiplexing (WDM) transmitters and coherent receivers. Among different options, quantum-dash (QD) mode-locked la…
View article: Quantum dash frequency comb laser stabilisation by optical self‐injection provided by an all‐fibre based delay‐controlled passive external cavity
Quantum dash frequency comb laser stabilisation by optical self‐injection provided by an all‐fibre based delay‐controlled passive external cavity Open
The intermode beat frequency stability of a 1 mm long quantum dash self mode‐locked semiconductor laser emitting optical frequency combs centred at 1535 nm is improved by single‐cavity optical self‐injection. A novel all‐fibre based cavity…
View article: Restoring robust binary switching operation and exceptional point using long-period grating-assisted parity-time symmetric couplers
Restoring robust binary switching operation and exceptional point using long-period grating-assisted parity-time symmetric couplers Open
The impact of imbalance in waveguide propagation constants among parity-time symmetric coupled waveguides and/or of a complex-valued coupling coefficient is assessed. The narrow tolerance found implies that attempts to tightly control wave…
View article: Coupled oscillator ensembles with loss and gain: a graph approach of PT symmetry
Coupled oscillator ensembles with loss and gain: a graph approach of PT symmetry Open
We present a approach aimed at generalizing Parity-Time symmetry to mesoscopic ensembles of coupled oscillators with gain and loss, with inspiration from graph-theoretic tools. We globally minimize the imaginary part of the eigenvalues for…
View article: Coherent WDM transmission using quantum-dash mode-locked laser diodes as multi-wavelength source and local oscillator
Coherent WDM transmission using quantum-dash mode-locked laser diodes as multi-wavelength source and local oscillator Open
Quantum-dash (QD) mode-locked laser diodes (MLLD) lend themselves as chip-scale frequency comb generators for highly scalable wavelength-division multiplexing (WDM) links in future data-center, campus-area, or metropolitan networks.Driven …
View article: High-Power 810-nm Passively Mode-Locked Laser Diode With Al-Free Active Region
High-Power 810-nm Passively Mode-Locked Laser Diode With Al-Free Active Region Open
We report on a mode locked semiconductor laser for high-power pulse generation in the 810-nm waveband. This is based on a novel GaAsP/GaInP single quantum-well structure, with Aluminum-free active region. Average output powers higher than …
View article: Fast-Recovery of the Amplitude and Phase of Short Optical Pulses Using a Frequency-Swept Source Based Heterodyne Measurement
Fast-Recovery of the Amplitude and Phase of Short Optical Pulses Using a Frequency-Swept Source Based Heterodyne Measurement Open
We propose a very fast heterodyne technique to recover the amplitude and phase of short optical pulses generated, e.g., by a mode-locked laser. A linearly swept frequency source is used to scan the entire optical spectrum of the mode-locke…
View article: Quantum-Dash Semiconductor Laser Characterization Using Continuous Tuning Optical Swept Source
Quantum-Dash Semiconductor Laser Characterization Using Continuous Tuning Optical Swept Source Open
Device characterization of Quantum-Dash semiconductor mode-locked laser using a continuous tuning swept source is presented. This technique is linear, simple and does not require any prior information about the signal under test.
View article: Modeling, design, fabrication and experimentation of a GaN-based,<sup>63</sup>Ni betavoltaic battery
Modeling, design, fabrication and experimentation of a GaN-based,<sup>63</sup>Ni betavoltaic battery Open
International audience
View article: Tunable X-Band Optoelectronic Oscillators Based on External-Cavity Semiconductor Lasers
Tunable X-Band Optoelectronic Oscillators Based on External-Cavity Semiconductor Lasers Open
Laser diodes with optical feedback can exhibit periodic intensity\noscillations at or near the relaxation-oscillation frequency. We demonstrate\noptoelectronic oscillators based on external-cavity semiconductor lasers in a\nperiodic dynami…
View article: Chip-scale frequency comb generators for high-speed communications and optical metrology
Chip-scale frequency comb generators for high-speed communications and optical metrology Open
Chip-scale frequency comb sources are key elements for a variety of applications, comprising massively parallel optical communications and high-precision optical metrology. In this talk, we give an overview on our recent progress in the ar…
View article: Simple dispersion estimate for single-section quantum-dash and quantum-dot mode-locked laser diodes
Simple dispersion estimate for single-section quantum-dash and quantum-dot mode-locked laser diodes Open
The optical outputs of single-section quantum-dash and quantum-dot mode-locked lasers (MLLs) are well known to exhibit strong group velocity dispersion. Based on careful measurements of the spectral phase of the pulses from these MLLs, we …
View article: Silicon-organic hybrid (SOH) devices and their use in comb-based communication systems
Silicon-organic hybrid (SOH) devices and their use in comb-based communication systems Open
Advanced wavelength-division multiplex-ing (WDM) requires both efficient multi-wavelength light sources to generate optical carriers and highly scalable photonic-electronic interfaces to encode data on these carriers. In this paper, we giv…
View article: Multi-terabit/s transmission using chip-scale frequency comb sources
Multi-terabit/s transmission using chip-scale frequency comb sources Open
Chip-scale frequency comb sources are likely to become key elements of future terabit/s optical transceivers. We investigate and demonstrate the viability of different comb generation schemes for transmission at multiterabit/s data rates.
View article: Local parity-time symmetry functional devices for integrated optics
Local parity-time symmetry functional devices for integrated optics Open
We address the potential of a system with gain and loss featuring a PT-symmetric configuration for the realization of tunable, reconfigurable and non-reciprocal devices. By using PT-symmetric coupled waveguides and Bragg reflectors as fund…
View article: 200-Gb/s Baudrate-Pilot-Aided QPSK/Direct Detection With Single-Section Quantum-Well Mode-Locked Laser
200-Gb/s Baudrate-Pilot-Aided QPSK/Direct Detection With Single-Section Quantum-Well Mode-Locked Laser Open
We demonstrate transmission of a 200-Gb/s superchannel over 3-km single-mode optical fiber (SMF) targeting intra-data center interconnect applications using a novel single-section quantum-well passive-mode-locked laser that generates an op…