Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.66: Poster
Mittwoch, 3. April 2019, 17:30–20:00, Poster E
Ultrafast pulse generation and pulse train stability of an InP generic foundry platform passively mode-locked symmetric ring laser with dual saturable absorbers — •Christoph Weber1, Mu-Chieh Lo2, Dominik Auth1, Patrick Fiala1, Pascal Sauer1, Guillermo Carpintero2, and Stefan Breuer1 — 1Institute of Applied Physics, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany — 2Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid, Av de la Universidad, 30. 28911 Leganés, Madrid, Spain
Passively mode-locked semiconductor lasers in photonic integrated circuits are promising compact sources for generating coherent optical frequency combs and ultrashort optical pulse trains for metrology, spectroscopy and millimeter wave/terahertz applications. An InP foundry-fabricated semiconductor ring laser emitting at 1570 nm with two saturable absorbers is experimentally investigated. A symmetry geometry allows the circulating optical pulses to collide in the two reverse-biased saturable absorbers placed opposite to each other enhancing the pulse shortening. Stable optical pulse trains with repetition rates at 23.3 GHz, spectral bandwidth exceeding 10 nm, a radio-frequency line width of 80 kHz corresponding to a pulse-to-pulse timing jitter of 31.7 fs and optical pulses as short as 1.2 ps at a time-bandwidth-product of 0.7 are experimentally reported.