Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature

Hedwig Knoetig; Borislav Hinkov; Robert Weih; Sven Hoefling; Johannes Koeth; Gottfried Strasser

doi:10.1063/1.5139649

Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature

Hedwig Knoetig^*, Borislav Hinkov, Robert Weih, Sven Hoefling, Johannes Koeth, Gottfried Strasser

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We present vertical light emission in continuous-wave mode from an interband cascade laser (ICL) at a record temperature of up to 38 °C. These results pave the way toward a more efficient and compact integration of this technology in mobile spectroscopic applications. Our approach employs ring cavity ICLs that are mounted epi-side down for efficient heat extraction from the devices. The vertical single-mode emission relies on a metallized second-order distributed-feedback grating designed for an emission wavelength of 3.8 μm. A single lateral mode operation is favored by a narrow waveguide width of 4 μm. Optical output powers of more than 6 mW were measured at 20 °C for rings with a diameter of ∼800 μm. At this temperature, the threshold current-density amounted to 0.60 kA/cm² and the device showed continuous current and temperature tuning rates of 0.06 nm/mA and 0.37 nm/K, respectively.

Original language	English
Article number	131101
Number of pages	5
Journal	Applied Physics Letters
Volume	116
Issue number	13
Early online date	30 Mar 2020
DOIs	https://doi.org/10.1063/1.5139649
Publication status	Published - 30 Mar 2020

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title = "Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature",

abstract = "We present vertical light emission in continuous-wave mode from an interband cascade laser (ICL) at a record temperature of up to 38 °C. These results pave the way toward a more efficient and compact integration of this technology in mobile spectroscopic applications. Our approach employs ring cavity ICLs that are mounted epi-side down for efficient heat extraction from the devices. The vertical single-mode emission relies on a metallized second-order distributed-feedback grating designed for an emission wavelength of 3.8 μm. A single lateral mode operation is favored by a narrow waveguide width of 4 μm. Optical output powers of more than 6 mW were measured at 20 °C for rings with a diameter of ∼800 μm. At this temperature, the threshold current-density amounted to 0.60 kA/cm2 and the device showed continuous current and temperature tuning rates of 0.06 nm/mA and 0.37 nm/K, respectively.",

author = "Hedwig Knoetig and Borislav Hinkov and Robert Weih and Sven Hoefling and Johannes Koeth and Gottfried Strasser",

note = "Funding: The authors are grateful for financial support received under Austrian Research Promotion Agency (FFG) project No. 1516332 (ATMO-SENSE).",

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doi = "10.1063/1.5139649",

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volume = "116",

journal = "Applied Physics Letters",

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T1 - Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature

AU - Knoetig, Hedwig

AU - Hinkov, Borislav

AU - Weih, Robert

AU - Hoefling, Sven

AU - Koeth, Johannes

AU - Strasser, Gottfried

N1 - Funding: The authors are grateful for financial support received under Austrian Research Promotion Agency (FFG) project No. 1516332 (ATMO-SENSE).

PY - 2020/3/30

Y1 - 2020/3/30

N2 - We present vertical light emission in continuous-wave mode from an interband cascade laser (ICL) at a record temperature of up to 38 °C. These results pave the way toward a more efficient and compact integration of this technology in mobile spectroscopic applications. Our approach employs ring cavity ICLs that are mounted epi-side down for efficient heat extraction from the devices. The vertical single-mode emission relies on a metallized second-order distributed-feedback grating designed for an emission wavelength of 3.8 μm. A single lateral mode operation is favored by a narrow waveguide width of 4 μm. Optical output powers of more than 6 mW were measured at 20 °C for rings with a diameter of ∼800 μm. At this temperature, the threshold current-density amounted to 0.60 kA/cm2 and the device showed continuous current and temperature tuning rates of 0.06 nm/mA and 0.37 nm/K, respectively.

AB - We present vertical light emission in continuous-wave mode from an interband cascade laser (ICL) at a record temperature of up to 38 °C. These results pave the way toward a more efficient and compact integration of this technology in mobile spectroscopic applications. Our approach employs ring cavity ICLs that are mounted epi-side down for efficient heat extraction from the devices. The vertical single-mode emission relies on a metallized second-order distributed-feedback grating designed for an emission wavelength of 3.8 μm. A single lateral mode operation is favored by a narrow waveguide width of 4 μm. Optical output powers of more than 6 mW were measured at 20 °C for rings with a diameter of ∼800 μm. At this temperature, the threshold current-density amounted to 0.60 kA/cm2 and the device showed continuous current and temperature tuning rates of 0.06 nm/mA and 0.37 nm/K, respectively.

U2 - 10.1063/1.5139649

DO - 10.1063/1.5139649

M3 - Article

SN - 0003-6951

VL - 116

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 131101

ER -

Continuous-wave operation of vertically emitting ring interband cascade lasers at room temperature

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