Above 20â
GHz high frequency operation of mid-infrared doughnut-shaped microcavity quantum cascade lasers.
Opt Express
; 31(25): 42677-42686, 2023 Dec 04.
Article
em En
| MEDLINE
| ID: mdl-38087636
ABSTRACT
Microresonator-based high-speed single-mode quantum cascade lasers are ideal candidates for on-chip optical data interconnection and high sensitivity gas sensing in the mid-infrared spectral range. In this paper, we propose a high frequency operation of single-mode doughnut-shaped microcavity quantum cascade laser at â¼4.6â
µm. By leveraging compact micro-ring resonators and integrating with grounded coplanar waveguide transmission lines, we have greatly reduced the parasitics originating from both the device and wire bonding. In addition, a selective heat dissipation scheme was introduced to improve the thermal characteristics of the device by semi-insulating InP infill regrowth. The highest continuous wave operating temperature of the device reaches 288â
K. A maximum -3â
dB bandwidth of 11â
GHz and a cut-off frequency exceeding 20â
GHz in a microwave rectification technique are obtained. Benefiting from the notch at the short axis of the microcavity resonator, a highly customized far-field profile with an in-plane beam divergence angle of 2.4° is achieved.
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MEDLINE
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article