Frequency modulated external cavity laser with photonic crystal resonator and microheater

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Butler, Sharon M.
Bakoz, Andrei P.
Liles, Alexandros A.
Viktorov, Evgeny A.
O'Faolain, Liam
Hegarty, Stephen P.
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Society of Photo-Optical Instrumentation Engineers (SPIE)
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We demonstrate frequency modulation (FM) in an external cavity III-V/Silicon laser, comprising a Reflective Semiconductor Optical Amplifier (RSOA) and an SU8 polymer waveguide vertically coupled to a 2D Silicon Photonic Crystal (PhC) cavity. Laser FM was achieved by local heating of the PhC using a resistive element of Ni-Cr metal as a microheater to change the refractive index in the cavity hence changing the lasing frequency. Presented is a thermal study of the laser dynamics and observations of the shift in lasing frequency.
Semiconductor lasers , Photonic crystal , Frequency modulation , Silicon thermo-optic effect
Butler, S. M., Bakoz, A. P., Liles, A. A., Viktorov, E. A., O'Faolain, L. and Hegarty, S. P. (2018) 'Frequency modulated external cavity laser with photonic crystal resonator and microheater', Proceedings of SPIE 10682: Semiconductor Lasers and Laser Dynamics VIII, 106822D (5pp), SPIE Photonics Europe, Strasbourg, France, 22-26 April. doi:10.1117/12.2319142
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