We report a type-Ⅱ GaSb-based interband cascade laser operating a continuous wave at room temperature. The cascade region of interband cascade laser was designed using the ‘W' configuration of the active quantum...We report a type-Ⅱ GaSb-based interband cascade laser operating a continuous wave at room temperature. The cascade region of interband cascade laser was designed using the ‘W' configuration of the active quantum wells and the ‘Carrier Rebalancing' method in the electron injector. The devices were processed into narrow ridges and mounted epitaxial side down on a copper heat sink. The 25-μm-wide, 3-mm-long ridge without coated facets generated 41.4 mW of continuous wave output power at T = 15℃. And a low threshold current density of 267 A/cm^2 is achieved. The emission wavelength of the ICL is 3452.3 nm at 0.5 A.展开更多
InAs-based interband cascade lasers（ICLs） with InAs plasmon waveguides or InAs/AlSb superlattice（SL） waveguides were demonstrated at emission wavelengths below 4.1 μm. The threshold current densities of the laser...InAs-based interband cascade lasers（ICLs） with InAs plasmon waveguides or InAs/AlSb superlattice（SL） waveguides were demonstrated at emission wavelengths below 4.1 μm. The threshold current densities of the lasers with SL waveguides were 37 A/cm;at 77 K in continuous wave mode. The operation temperature of these lasers reached room temperature in pulsed mode. Compared with the thick InAs n++ plasmon cladding layer, the InAs/AlSb superlattice cladding layers have greater advantages for ICLs with wavelengths less than 4 μm even in InAs based ICLs because in the short-wavelength region they have a higher confinement factor than InAs plasmon waveguides.展开更多
We demonstrate Ga Sb-based interband cascade lasers(ICLs) emitting around 3.65 μm, which exhibit a room-temperature continuous-wave(CW) output power above 100 m W. Cavity-length analysis showed that the laser structu...We demonstrate Ga Sb-based interband cascade lasers(ICLs) emitting around 3.65 μm, which exhibit a room-temperature continuous-wave(CW) output power above 100 m W. Cavity-length analysis showed that the laser structure has a low internal loss of 3 cm^(-1) while maintaining a total internal quantum efficiency greater than one. After 6400 h CW operation at 25°C,the threshold current of the laser increased by 3%, and the output power decreased by 7%, indicating good reliability of the device.展开更多
With the progress of the laser manufacturing technology, trace gas sensors based on tunable interband cascade lasers （ICLs） and quantum cascade lasers （QCLs） have been widely used to detect organic compounds with ...With the progress of the laser manufacturing technology, trace gas sensors based on tunable interband cascade lasers （ICLs） and quantum cascade lasers （QCLs） have been widely used to detect organic compounds with high sensitivity. Compared with overtone and combination bands in the near infrared region, for many species, the intensities of fundamental rotational-vibrational absorption bands in the mid-infrared region are much stronger. In this paper, we demonstrate an ethanol sensor using a room-temperature continuous-wave （CW） tunable ICL laser as a light source to detect ethanol vapor concentration with high sensitivity. Combined with the first harmonic （1 f） normalized second harmonic （2f） wavelength modulation spectroscopy （WMS） technology, the characteristics of the harmonics of the system are analyzed, and the amplitude of the first harmonic decrease with an increased concentration of ethanol has been demonstrated both theoretically and experimentally. As a result, a detection limitation of 28 ppb is achieved.展开更多
基金Project supported by the Major Program of the National Natural Science Foundation of China(Grant No.61790580)the National Natural Science Foundation of China(Grant No.61435012)the National Basic Research Program of China(Grant No.2014CB643903)
文摘We report a type-Ⅱ GaSb-based interband cascade laser operating a continuous wave at room temperature. The cascade region of interband cascade laser was designed using the ‘W' configuration of the active quantum wells and the ‘Carrier Rebalancing' method in the electron injector. The devices were processed into narrow ridges and mounted epitaxial side down on a copper heat sink. The 25-μm-wide, 3-mm-long ridge without coated facets generated 41.4 mW of continuous wave output power at T = 15℃. And a low threshold current density of 267 A/cm^2 is achieved. The emission wavelength of the ICL is 3452.3 nm at 0.5 A.
基金Project supported by the National Natural Science Foundation of China(Nos.61790583,61774150,61774151)the National Basic Research Program of China(No.2014CB643903)
文摘InAs-based interband cascade lasers（ICLs） with InAs plasmon waveguides or InAs/AlSb superlattice（SL） waveguides were demonstrated at emission wavelengths below 4.1 μm. The threshold current densities of the lasers with SL waveguides were 37 A/cm;at 77 K in continuous wave mode. The operation temperature of these lasers reached room temperature in pulsed mode. Compared with the thick InAs n++ plasmon cladding layer, the InAs/AlSb superlattice cladding layers have greater advantages for ICLs with wavelengths less than 4 μm even in InAs based ICLs because in the short-wavelength region they have a higher confinement factor than InAs plasmon waveguides.
基金This work was supported by the National Key Research and Development Project(No.2018YFB2200500)the National Natural Science Foundation of China(Nos.61790583 and 61774150)。
文摘We demonstrate Ga Sb-based interband cascade lasers(ICLs) emitting around 3.65 μm, which exhibit a room-temperature continuous-wave(CW) output power above 100 m W. Cavity-length analysis showed that the laser structure has a low internal loss of 3 cm^(-1) while maintaining a total internal quantum efficiency greater than one. After 6400 h CW operation at 25°C,the threshold current of the laser increased by 3%, and the output power decreased by 7%, indicating good reliability of the device.
文摘With the progress of the laser manufacturing technology, trace gas sensors based on tunable interband cascade lasers （ICLs） and quantum cascade lasers （QCLs） have been widely used to detect organic compounds with high sensitivity. Compared with overtone and combination bands in the near infrared region, for many species, the intensities of fundamental rotational-vibrational absorption bands in the mid-infrared region are much stronger. In this paper, we demonstrate an ethanol sensor using a room-temperature continuous-wave （CW） tunable ICL laser as a light source to detect ethanol vapor concentration with high sensitivity. Combined with the first harmonic （1 f） normalized second harmonic （2f） wavelength modulation spectroscopy （WMS） technology, the characteristics of the harmonics of the system are analyzed, and the amplitude of the first harmonic decrease with an increased concentration of ethanol has been demonstrated both theoretically and experimentally. As a result, a detection limitation of 28 ppb is achieved.
