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Design and characterisation of multi-mode interference reflector lasers for integrated photonics

Albeladi, F. T., Gillgrass, S., Nabialek, J., Mishra, P., Forrest, R., Albiladi, T. R., Allford, C. P. ORCID:, Deng, H., Tang, M., Liu, H-Y, Shutts, S. ORCID: and Smowton, P. M. ORCID: 2023. Design and characterisation of multi-mode interference reflector lasers for integrated photonics. Journal of Physics D: Applied Physics 56 (38) , 384001. 10.1088/1361-6463/acdb80

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InAs quantum dot ridge waveguide lasers comprising single-port multi-mode-interference-reflectors (MMIR) and single-cleaved reflectors are designed, fabricated, and characterised, to demonstrate capability for optoelectronic-integrated-circuits. Simulations of an MMIR show high values of fundamental mode reflectivity ( >80%) and good selectivity against higher order modes. Deep-etched MMIR lasers fabricated with 0.5 mm long cavities have a threshold current of 24 mA, compared to 75 mA for standard Fabry–Perot cleaved–cleaved FP-RWG lasers of the same length, both at 25 °C, and 56 mA compared to 102 mA at 55 °C. MMIR lasers exhibit stable ground state operation up to 50 °C and show promise as small footprint sources for integrated photonics.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Additional Information: License information from Publisher: LICENSE 1: URL:, Type: cc-by
Publisher: IOP Publishing
ISSN: 0022-3727
Funders: EPSRC
Date of First Compliant Deposit: 20 June 2023
Date of Acceptance: 5 June 2023
Last Modified: 06 Jan 2024 02:20

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