6533b85dfe1ef96bd12be8b0
RESEARCH PRODUCT
Kerr beam self-cleaning in the telecom band
Guy MillotAlexandre ParriauxSébastien FévrierKatarzyna KrupaAlessandro TonelloMarc FabertLaure LavouteStefano WabnitzMathieu JossentDmitry GaponovY. LeventouxG. GrangerVincent Coudercsubject
Materials scienceKerr effect02 engineering and technologyKerr effect; multimode fibers; transverse effects01 natural scienceslaw.invention010309 opticssymbols.namesakelaw0103 physical sciencesFiber[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/MicroelectronicsComputingMilieux_MISCELLANEOUSMulti-mode optical fiberbusiness.industry021001 nanoscience & nanotechnologyLaserWavelengthsymbols[SPI.OPTI]Engineering Sciences [physics]/Optics / PhotonicLaser beam quality0210 nano-technologyTelecommunicationsbusinessRaman scatteringBeam (structure)description
Multimode graded index (GRIN) fibers received a renewed interest in recent years, in particular for the development of new laser sources [1]. In many cases, the use of GRIN fibers is limited by multimodal propagation, leading to a spatially modulated intensity distribution (speckles) at the fiber output. Recent studies have found that quasi-single mode propagation can be recovered in GRIN fibers by the so-called Kerr self-cleaning effect [2]. It consists in the spontaneous recovery of the spatial beam quality, without any frequency shift [2] (as opposed to, e.g., Raman beam self-cleaning [3]). This nonlinear process was only observed so far at laser wavelengths around 1 μm, for peak power levels above a certain threshold value. In this communication, we show that Kerr beam self-cleaning also occurs in a GRIN fiber pumped with chirped pulses in the telecom band (1562 nm). At these wavelengths, the power threshold of the self-cleaning process is decreased by one order of magnitude with respect to pumping at 1 μm.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-23 |