A5072788428- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- graph theory and CDMA systems
- Advanced Fiber Optic Sensors
- Coding theory and cryptography
- Mechanical and Optical Resonators
- Advanced Optical Network Technologies
- Advanced Frequency and Time Standards
- Laser Design and Applications
- Advanced Optical Sensing Technologies
- semigroups and automata theory
- Photonic Crystal and Fiber Optics
- Wireless Communication Networks Research
- Ocular and Laser Science Research
- International Arbitration and Investment Law
- Geophysics and Sensor Technology
- Adaptive optics and wavefront sensing
- Biochemical and Structural Characterization
- Advanced Sensor Technologies Research
- Inertial Sensor and Navigation
- Advanced Measurement and Metrology Techniques
TeraXion (Canada)
2012-2024
The University of Tokyo
2018
Osaka University
2018
Kyoto University
2018
Nagoya University
2018
Tohoku University
2018
Latitude Pharmaceuticals (United States)
2018
Université Laval
2003-2008
Intel (United States)
2007-2008
Mission College
2007
This paper presents the experimental demonstration and simulation results of a frequency-encoded optical code-division multiple-access (FE-OCDMA) system using broad-band incoherent source, superimposed fiber Bragg gratings for encoding/decoding unipolar m-sequence codes, balanced detection. The bit-error rate is measured up to four simultaneous users at 155 622 Mb/s. Exploiting excellent match between experiment, concludes with prediction potential capacity an optimized FE-CDMA system.
We present multi-frequency low-noise semiconductor laser sources for resonant fiber optic gyroscope (RFOG) interrogation that have enabled excellent gyro stability over temperature. Each source includes three distributed feedback chips coupled with micro-lenses to multi-component silicon photonics (SiP) chips. A first laser, the master, is locked RFOG a Pound-Drever-Hall loop. Two slave lasers are optically phase-locked master electrical loop bandwidths of 100 MHz. The SiP perform beat note...
This paper presents the spectral efficiency of frequency-encoded (FE) optical code-division multiple-access (OCDMA) systems with incoherent sources. The five code families compatible FE-OCDMA is calculated as a function number users. Analytical equations valid in limiting case Gaussian noise are also developed for bit-error rate and efficiency. Among considered, modified quadratic congruence leads to maximum achievable
Label stacking is used for hierarchical addressing to reduce the size of lookup tables and increase speed routing process. We propose an optical label using spectral-amplitude codes (SAC) as labels accomplish ultrafast packet forwarding. discuss advantages this architecture compared other proposals in literature present experimental results. experimentally examine two types packets, one with separable SAC SAC-encoded payloads. In first case, a collection spectral tones modulated at rate (low...
We experimentally demonstrate dispersion compensation using a silicon-based optical phase conjugator. achieve simultaneous transmission of four dense wavelength division multiplexing (DWDM) channels spaced at 100 GHz and operating 10 Gbits/s over 320 km standard fiber. The measured power penalty bit error rate 10(-9) is less than 0.3 dB.
We review the improved performances of a narrow linewidth laser using negative electrical feedback obtained through advances on narrowband FBG filters. Noteworthy, tolerance to vibrations is significantly improved. As an extension this work, these filters are proposed for filtering optical signals in RF photonics systems.
In optical code-division multiple access (OCDMA), the bandwidth is accessed simultaneously by users, leading to beat noise in photodetection. The choice of source can have important impact on that noise. this paper, we compare two sources, a broad-band erbium-doped fiber and multilaser source. Experimental results for wavelength-time OCDMA system are presented up four simultaneous users. Bit-error-rate curves measured at 1.25 Gb/s with chip rate 10 Gchip/s. It shown outperforms design...
This paper reports recent progress in resonator fiber optic gyroscope (RFOG) development towards realization of a next generation compact device for commercial navigation applications by incorporation novel signal processing technique to reduce error terms from backscattered light and producing miniature three-laser source optical sensing. We have recently presented RFOGs using phase locked diode lasers miniaturized optics on silicon bench (SiOB), as well demonstrating navigation-grade angle...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We propose and demonstrate a novel ultrafast label processor that can recognize multiple spectral amplitude coded (SAC) labels using four wave mixing (FWM) sideband allocation selective optical filtering. Our proposed solution favors hardware simplicity over bandwidth efficiency in order to achieve recognition at reasonable cost. implementation, unlike all other processing techniques, does not...
The Laser Synthesizer of the Atacama Large Millimiter Array telescope in Chile has been designed and built by TeraXion. We present design performance achieved with this instrument.
We consider three different strategies for maximizing the capacity while minimizing cost of spectral amplitude coding optical code-division multiple access (SAC-OCDMA): incoherent sources, multilaser sources and forward error correction (FEC). Due to their low wide bandwidth, are often considered SAC-OCDMA. Such exhibit reduced efficiency due intensity-noise- limited performance. For single user systems, coherent offer greater improved performance; this is not necessarily case OCDMA. Even...
A silicon photonic tunable optical dispersion compensator (TODC) is demonstrated based on a series of 5 thermally Mach- Zehnder interferometers. The TODC has 2.8mm x 5.0 mm foot-print with continuously from 0ps/nm to 2000ps/nm low tuning power 80mW. This used extend the reach 10Gb/s link 85km 150km.
We study the balanced detection of broadband incoherent optical signals-signals characterized by high-intensity noise. consider signals generated from a single source with two types correlation: identical spectra, but delayed in time, and overlapping, nonidentical spectra zero time delay. Our statistical analysis yields equations for probability density function (pdf) detector output partially correlated input based on easily measured system parameters (power spectral densities one case,...
The use of a silicon-waveguide-based optical phase conjugator at the mid-span fibre link for dispersion compensation is experimentally demonstrated, enabling transmission data up to 40 Gbit/s over 320 km standard with clear open eye diagrams receiver. In addition, feasibility multiple DWDM channels simultaneously demostrated. A signal conversion efficiency −10 dB obtained pump intensity 37.5 MW/cm2 in waveguide.
We propose and demonstrate a novel scheme for frequency-encoded optical code division multiple access (FE-OCDMA). Eight-wavelength superimposed fiber Bragg gratings (SFBGs) are used to encode four channels at 155 Mb/s. Multiple interference suppression is achieved using M-sequence codes with balanced detection.
We demonstrate a standalone (no global clock) receiver for two-dimensional wavelength-time optical code-division multiple-access. The provides the following functions: quantization (to eliminate multiple access interference), clock and data recovery, return-to-zero to nonreturn-to-zero conversion (for multiple-access compatibility with digital logic), framing byte synchronization), forward-error correction (FEC) using (255, 239) Reed-Solomon decoder. more than doubles number of supported...
Radio-frequency (RF) photonics is demonstrating superior performance in communication systems using discrete components. As establish an upgrade path balancing challenging bandwidth requirements with size, weight, and power constraints, the time ripe for transition to a more efficient cost-effective hybrid manufacturing technology. This technology has been applied construction of optical coherent receiver down conversion RF signals from 10-18 2 GHz. Light distributed feedback semiconductor...
We propose a self-forwarding packet-switched optical network with bit-parallel multi-wavelength labels. experimentally demonstrate transmission of variable-length packets over 80 km fiber and switching 1×4 multistage switch two stages.
Sensing systems for defense and security operate in evermore demanding environments, increasingly leaving the comfort zone of fiber laser technology. Efficient rugged sources are required that maintain a high level performance under large temperature excursions sizable vibrations. This paper first presents sample sensing applications requiring with narrow emission spectrum. Laser specifications interest reviewed. The effect frequency noise interferometric is discussed techniques implemented...
This paper covers latest progress in the development and testing of a Silicon Photonics (SiP) based three-laser source for use next generation compact resonator fiber optic gyroscope (RFOG) targeted commercial navigation applications. In recent years, significant has been made RFOGs using phase locked diode lasers miniaturized optics on silicon optical bench (SiOB). While we have able to demonstrate near or at civil grade performance with technology, one our biggest remaining hurdles is do...
We present a compact four-laser source based on low-noise, high-bandwidth Pound-Drever-Hall method and optical phase-locked loops for sensing narrow spectral features. Four semiconductor external cavity lasers in butterfly packages are mounted shared electronics control board all other functions integrated single silicon photonics chip. This high performance is compact, automated, robust, operates over wide temperature range remains locked days. A laser to resonance frequency noise of 0.25...
The BER performance of a 2D λ-t OCDMA system is compared experimentally with optimum sampling (global clock) and non-optimum (recovered clock from an receiver). power penalties the receiver are quantified, impact interferers on its determined.
The relative phase between two fiber lasers is controlled via a high performance optical phase-locked loop (OPLL). Two parameters are of particular importance for the design: intrinsic noise laser (i.e. its linewidth) and high-gain, low-noise electronic locking loop. In this work, one lowest commercially available was selected NP Photonics Rock module), with sub-kHz linewidth at 1550.12 nm. However, fast tuning mechanism such through stretching cavity length piezoelectric transducer which...
We demonstrate experimentally for the first time successful forwarding of packets using spectral-amplitude-code labels and label stacking in a two-hop network. Optical code-label can be used hierarchical routing, virtual-private networks path protection