Abstract
We report greatly enhanced modulation response of multimode vertical-cavity surface-emitting lasers (MM-VCSELs), for the first time, using optical injection locking. A 3-dB bandwidth of 38 GHz and 54 GHz resonance frequency are achieved using a MM-VCSEL with a 3 GHz free-running bandwidth. We show that transverse mode selection can be attained with optical injection locking through frequency and spatial detuning.
Highlights
Increased demands on performance and cost are being placed on high-speed transmitters for short-reach (< 1 km) fiber-optic communications
We report greatly enhanced modulation response of multimode vertical-cavity surface-emitting lasers (MM-VCSELs), for the first time, using optical injection locking
We show that transverse mode selection can be attained with optical injection locking through frequency and spatial detuning
Summary
Increased demands on performance and cost are being placed on high-speed transmitters for short-reach (< 1 km) fiber-optic communications. Modal dispersion and mode competition noise limit the speed and transmission distance of MM lasers [3,4]. These problems can be eliminated by using a single-mode laser but with a tradeoff in cost for performance. Optical injection locking (OIL) of single-mode (SM) VCSELs has previously been demonstrated to improve both modulation speed and transmission distance [5,6,7,8]. Leveraging the spectrally and spatially well separated transverse modes of MM VCSELs (Fig. 1) we show a tailorable frequency response We believe that this result can provide an excellent solution for low-cost upgrades of existing short-reach optical networks
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