Mode-locked oscillation of Cr:ZnS laser using a single walled carbon nanotube film with resonant absorption at 2.4 μm

Daiki Okazaki, Hayato Arai, Esko I. Kauppinen, Shohei Chiashi, Shigeo Maruyama, Satoshi Ashihara

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

Abstrakti

Ultrashort pulses in the mid-infrared (mid-IR) region have a great potential in the applications of advanced vibrational spectroscopy and strong field phenomena. Traditionally, mid-IR ultrashort pulses are generated by frequency conversion of near-infrared pulses from Ti:S or Yb-based lasers. Laser oscillators which directly emit mid-IR femtosecond pulses are advantageous from the perspectives of simplicity and energy extraction efficiency. Cr:ZnS is an attractive gain medium for mid-IR ultrafast lasers because it has a broad fluorescence spectrum, large stimulated-emission cross-section and high thermal conductivity [1]. So far, passive mode-locking has been realized for Cr:ZnS laser, by employing Kerr-lensing, or by using saturable absorbers based on semiconductors or graphenes [2]. A single walled carbon nanotube (SWCNT) film is also known as a good candidate for saturable absorbers, possessing tunable resonance and large modulation depth. However, SWCNTs have rarely been applied to this laser [3]. Here, we demonstrate self-starting mode-locked oscillation of Cr:ZnS laser by using a SWCNT film which has resonant absorption at the laser emission wavelength of 2.4 μm.

AlkuperäiskieliEnglanti
Otsikko2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
KustantajaIEEE
ISBN (elektroninen)9781728104690
DOI - pysyväislinkit
TilaJulkaistu - 1 kesäk. 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaEuropean Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference - Munich, Saksa
Kesto: 23 kesäk. 201927 kesäk. 2019

Conference

ConferenceEuropean Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference
LyhennettäCLEO/Europe-EQEC
Maa/AlueSaksa
KaupunkiMunich
Ajanjakso23/06/201927/06/2019

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