Title :
40 GHz Bandwidth and 64 GHz Resonance Frequency in Injection-Locked 1.55 μm VCSELs
Author :
Chrostowski, Lukas ; Faraji, Behnam ; Hofmann, Werner ; Amann, Markus-Christian ; Wieczorek, Sebastian ; Chow, Weng W.
Author_Institution :
British Columbia Univ., Vancouver
Abstract :
Injection locking is shown to greatly enhance the resonance frequency of 1.55 mum vertical-cavity surface-emitting lasers (VCSELs), from 10 to 60 GHz, under ultrahigh injection locking conditions. Using injection locking to increase the laser resonance frequency, together with a low parasitic VCSEL design, a 3 dB bandwidth of over 40 GHz was attained, a record broadband performance for directly modulated VCSELs. VCSELs with slightly detuned polarization modes are injection locked with controlled polarization angles. For the first time, a dual-resonance frequency response is observed, and is explained with a two polarization-mode injection-locked rate equation model.
Keywords :
frequency response; laser mode locking; light polarisation; semiconductor lasers; surface emitting lasers; Injection locking; VCSEL; bandwidth 40 GHz; frequency 10 GHz to 60 GHz; frequency 64 GHz; frequency response; laser resonance frequency; polarization modes; rate equation model; vertical cavity surface emitting lasers; wavelength 1.55 mum; Bandwidth; Frequency response; Injection-locked oscillators; Laser mode locking; Optical design; Polarization; Resonance; Resonant frequency; Surface emitting lasers; Vertical cavity surface emitting lasers; Direct modulation; frequency response; optical injection locking; vertical-cavity surface-emitting lasers (VCSELs);
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2007.904417
