Faraday optical isolator in the 9.2 $\mu$m range for QCL applications
  We have fabricated and characterized a n-doped InSb Faraday isolator in the mid-IR range (9.2 $\mu$m). A high isolation ratio of $\approx$30 dB with a transmission over 80% (polarizer losses not included) is obtained at room temperature. Further possible improvements are discussed. A similar design can be used to cover a wide wavelength range (lambda ~ 7.5-30 $\mu$m). 
Laurent Hilico (LKB - Jussieu, DPM), Albane Douillet (LKB - Jussieu,   DPM), Jean-Philippe Karr (LKB - Jussieu, DPM), Eric T...
physics.atom-ph physics.optics