Efficient carrier-envelope phase tunable mid-infrared frequency combs based on CW-seeded optical parametric generation
| Autor: | Juho Karhu, Jui-Yu Lai, Markku Vainio, Mikhail Roiz |
|---|---|
| Přispěvatelé: | University of Helsinki, HC Photonics Corp., Dept Signal Process and Acoust, Tampere University, Aalto-yliopisto, Aalto University, Department of Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Offset (computer science) QC1-999 Lithium niobate 116 Chemical sciences Physics::Optics 02 engineering and technology 01 natural sciences law.invention 010309 optics chemistry.chemical_compound Optics law 0103 physical sciences Pulse wave Parametric statistics business.industry Physics Carrier-envelope phase 021001 nanoscience & nanotechnology Laser chemistry Modulation Femtosecond 0210 nano-technology business |
| Zdroj: | EPJ Web of Conferences, Vol 255, p 11002 (2021) |
| Popis: | EOS Annual Meeting , EOSAM 2021 ; Conference date: 13-09-2021 Through 17-09-2021 We present an efficient method for generating frequency combs in the mid-infrared (MIR) spectral range in bulk lithium niobate crystals as well as in waveguides. Our approach is simple and robust, since it is based on single-pass configuration of femtosecond Optical Parametric Generation (OPG) seeded by a telecom continuous-wave laser. Precise and fast tuning of the seed laser allows to rapidly change the offset frequency of the generated MIR comb independent of its repetition rate. The MIR comb offset frequency is inherently known, so its direct detection is not required. An additional degree of freedom that further complements the versatility of our light source is a unique way of repetition rate or mode spacing adjustments. This is achieved by our new concept of coherent multi-seeding that depending on the configuration allows for pulse train modulation and mode spacing, or repetition rate division by an integer number. |
| Databáze: | OpenAIRE |
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