17 May 2017 Sub-picosecond pulse and terahertz optical frequency comb generation by monolithically integrated linear mode-locked laser
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Abstract
We report on a record broad 3-dB bandwidth of 14 nm (~1.8 THz around 1532 nm) optical frequency comb generated from a passively mode-locked quantum-well (QW) laser in the form of photonic integrated circuits through an InP generic photonic integration technology platform. This 21.5-GHz colliding-pulse mode-locked laser cavity is defined by two on-chip reflectors incorporating intracavity phase modulators followed by an out-of-cavity SOA as booster. Under certain operating conditions, an ultra-wide spectral bandwidth is achieved along with an autocorrelation trace confirming the mode locking nature exhibiting a pulse width of 0.35 ps. The beat note RF spectrum has a linewidth of sub-MHz and 35-dB SNR.
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Mu-Chieh Lo, Mu-Chieh Lo, Robinson Guzmán, Robinson Guzmán, Muhsin Ali, Muhsin Ali, Rui Santos, Rui Santos, Luc Augustin, Luc Augustin, Guillermo Carpintero, Guillermo Carpintero, } "Sub-picosecond pulse and terahertz optical frequency comb generation by monolithically integrated linear mode-locked laser", Proc. SPIE 10242, Integrated Optics: Physics and Simulations III, 102420A (17 May 2017); doi: 10.1117/12.2264930; https://doi.org/10.1117/12.2264930
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