公开(公告)号：US20200287353A1

公开(公告)日：2020-09-10

申请号：US16652514

申请日：2018-09-27

申请人： ETH Zürich

发明人： Jérôme FAIST ,  Yves BIDAUX ,  Filippos KAPSALIDIS

IPC分类号： H01S5/34 ,  H01S5/10 ,  H01S5/32 ,  H01S5/00 ,  H01S5/227

摘要： A waveguide heterostructure for a semiconductor laser with an active part, comprising an active region layer depending of the type of semiconductor used, which is sandwiched between an electrode layer and a substrate, usable for dispersion compensation in a semiconductor laser frequency comb setup, an optical frequency comb setup and a manufacturing method.

公开(公告)号：US20230307890A1

公开(公告)日：2023-09-28

申请号：US18041321

申请日：2021-08-18

申请人： ETH Zürich

发明人： Ruijun WANG ,  Jérôme FAIST

IPC分类号： H01S5/34 ,  H01S5/10

CPC分类号： H01S5/3402 ,  H01S5/1064 ,  H01S5/0655

摘要： A quantum cascade laser or interband cascade laser for outputting a frequency comb. The laser's active waveguide comprises a combination of narrow and wide sections which are engineered in combination such that the laser is operable to produce lasing only in the fundamental mode across the operating wavelength range, the narrow section squeezing light propagating in the waveguide to output a frequency comb via four-wave mixing. The narrow and wide sections are further engineered to reduce the waveguide's net GVD, and also to reduce the GVD variation across the operating range compared to a comparable waveguide that is of constant width, thus producing a more stable frequency comb. The proportion of the laser's full dynamic range (i.e. from threshold to the rollover current where the maximum output power is achieved) over which lasing remains in the frequency comb regime is thereby increased compared with a constant width single mode waveguide.