Publication
High-accuracy Brillouin gain spectrum measurements of single mode fibers
Related publications (76)
Polarization mode control of long-wavelength VCSELs by intracavity patterning
Elyahou Kapon, Benjamin Dwir, Alexandru Mereuta, Vladimir Iakovlev, Alexei Sirbu, Andrei Caliman, Zlatko Mickovic, Christopher Michael Long
Polarization mode control is enhanced in wafer-fused verticalcavity surface-emitting lasers emitting at 1310 nm wavelength by etching two symmetrically arranged arcs above the gain structure within the laser cavity. The intracavity patterning introduces bi ...
Optical Soc Amer2016Delivery of ultrashort spatially focused pulses through a multimode fiber for two photon endoscopic imaging
Demetri Psaltis, Christophe Moser, Salma Farahi, Edgar Emilio Morales Delgado
Due to their high number of supported modes, multimode optical fibers carry large amount of spatio-temporal information. However, propagation of a light pulse through a multimode optical fiber suffers from spatial distortions due to superposition of the va ...
Spie-Int Soc Optical Engineering2015Modelling the depletion length induced by modulation instability in distributed optical fibre sensors
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Mohammad Mehdi Alem Karladani
An analytical model for the depletion length of modulation instability in single-mode optical fibres is proposed. The model gives the possibility to determine the maximum sensing distance that distributed optical fibre sensors can reach before being limite ...
SPIE2014Analysis and Control of Optical Modes in VCSELs and VCSEL-Arrays
In this thesis, we studied the modal structure and the polarization of the optical field emitted by vertical-cavity surface-emitting lasers (VCSELs) emitting in the short- and long-wavelength domains (0.9-1.3μm). Our study concerns two types of components: ...
EPFL2013High-resolution, lensless endoscope based on digital scanning through a multimode optical fiber
Demetri Psaltis, Christophe Moser, Salma Farahi
We propose and experimentally demonstrate an ultra-thin rigid endoscope (450 mu m diameter) based on a passive multimode optical fiber. We use digital phase conjugation to overcome the modal scrambling of the fiber to tightly focus and scan the laser light ...
Optical Soc Amer2013Mitigating modulation instability in Brillouin distributed fibre sensors
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Wei Chen, Mohammad Mehdi Alem Karladani
A thorough study of the generation of modulation instability (MI) in distributed Brillouin fibre sensors is presented. ASE noise co-propagating with the pump pulses within the MI gain spectrum has been identified to be an important factor seeding modulatio ...
Spie-Int Soc Optical Engineering2013Reliability of 1310 nm Wafer Fused VCSELs
Elyahou Kapon, Grigore Suruceanu, Alexandru Mereuta, Vladimir Iakovlev, Alexei Sirbu, Andrei Caliman, Zlatko Mickovic
Wafer fusion vertical cavity surface emitting laser (VCSEL) technology has produced devices that successfully passed all mechanical and electrical Telcordia qualification tests. Accelerated lifetime tests result in times to 1% failure at 70 degrees C of 18 ...
Ieee-Inst Electrical Electronics Engineers Inc2013Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater
Luc Thévenaz, Sang Hoon Chin, Marcelo Alfonso Soto Hernandez
In this paper we combine the use of optical pulse coding and seeded second-order Raman amplification to extend the sensing distance of Brillouin optical time-domain analysis (BOTDA) sensors. Using 255-bit Simplex coding, the power levels of the Raman pumps ...
2012High-gain wavelength-selective amplification and cavity ring down spectroscopy in a fluoride glass erbium-doped microsphere
We experimentally demonstrate a compact optical amplifier consisting of a rare-earth-doped whispering-gallery-mode microsphere coupled via a tapered fiber. A gain up to 20 dB is reported in an erbium-doped fluoride glass microsphere 135 mu m in diameter. B ...
Optical Soc Amer2012Raman-based distributed temperature sensor with 1 m spatial resolution over 26 km SMF using low-repetition-rate cyclic pulse coding
Marcelo Alfonso Soto Hernandez
We experimentally investigate the benefits of a new optical pulse coding technique for long-range, meter and submeter scale Raman-based distributed temperature sensing on standard single-mode optical fibers. The proposed scheme combines a low-repetition-ra ...
2011