Broadband superluminescence, 5.9µm to 7.2µm, of a quantum cascade gain device
Anno: 2015
Autori: Riedi S., Cappelli F., Blaser S., Baroni P.-Y., Müller A., Faist J.
Affiliazione autori: ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland; CNR, Inst Nazl Ott, I-50019 Sesto Fiorentino, FI, Italy; European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, FI, Italy; Alpes Lasers SA, CH-2000 Neuchatel, Switzerland.
Abstract: The broadband electroluminescence of a quantum cascade device based on a multi-color active region covering the wavelengths 5.9µm-7.2µm was measured. Anti-reflection coatings were applied on both cleaved facets to remove the Fabry-Pérot cavity and prevent the device from lasing. This allows the latter to be studied either as a superluminescent diode or a single-pass amplifier in order to determine its suitability as a source for low speckle imaging applications. At 243 K, the amplified spontaneous emission has a peak power of 38µW that agrees well with a simple model of spontaneous emission intensity. The light of a similar structure could be modulated up to 1 GHz, limited by the RC constant of the device. The peak gain was measured from high-resolution luminescence spectra and determined to be 6.3 cm-1, corresponding to a single-pass gain of 1.89.
Giornale/Rivista: OPTICS EXPRESS
Volume: 23 (6) Da Pagina: 7184 A: 7189
Parole chiavi: Cascade connections; Light; Luminescence, Amplified spontaneous emissions; High resolution luminescence spectra; Quantum cascades; Quantum-cascade devices; Simple modeling; Single pass amplifiers; Superluminescence; Superluminescent diode, Spontaneous emissionDOI: 10.1364/OE.23.007184Citazioni: 14dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-04Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui
