Ge <sub/>22</sub> As <sub/>20</sub> Se <sub/>58</sub> glass ultrafast laser inscribed waveguides for mid-IR integrated opticsMorris, James M.; Mackenzie, Mark D.; Petersen, Christian R.; Demetriou, Giorgos; Kar, Ajoy K.; Bang, Ole; Bookey, Henry T. · Optical Materials Express · 2018