6533b858fe1ef96bd12b5b42
RESEARCH PRODUCT
Control of signal coherence in parametric frequency mixing with incoherent pumps: Narrowband mid-infrared light generation by downconversion of broadband amplified spontaneous emission source at 1550 nm
Antonio PicozziAlessandro TonelloStefan WabnitzDaniele ModottoGuy Millotsubject
Amplified spontaneous emissionLithium niobatePhysics::Optics01 natural sciences010309 opticsMEDIAchemistry.chemical_compoundOpticsNarrowband0103 physical sciencesSpectral width010306 general physicsPhysicsSum-frequency generationCRYSTALAcoustooptical devices; interferometry; mixer circuitsbusiness.industryQuantum noiseStatistical and Nonlinear PhysicsBEAMSOptical parametric amplifierAtomic and Molecular Physics and OpticsOUTPUTCONTINUUMchemistryOSCILLATORSbusinessPhotonic-crystal fiberdescription
International audience; We study, with numerical simulations using the generalized nonlinear envelope equation, the processes of optical parametric and difference- and sum-frequency generation (SFG) with incoherent pumps in optical media with both quadratic and third-order nonlinearity, such as periodically poled lithium niobate. With ultrabroadband amplified spontaneous emission pumps or continua (spectral widths > 10 THz), group-velocity matching of a near-IR pump and a short-wavelength mid-IR (MIR) idler in optical parametric generation may lead to more than 15-fold relative spectral narrowing of the generated MIR signal. Moreover, the SFG process may also lead to 6-fold signal coherence improvements. When using relatively narrowband filtered noise pumps (e.g., spectral widths < 1 THz), the signal from optical parametric, sum-frequency, and difference- frequency generation has nearly the same spectral width as that of the incoherent pump.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-10-24 |