Abstract
We have fabricated a high speed single mode microcavity laser of the form of oxide-confined vertical cavity surface emitting laser (VCSEL) and achieved an ultralow threshold current (ITH 0.13 mA at 20 °C) with lasing wavelength at 837 nm. The optical spectrum of the microcavity VCSEL exhibits a mode spacing of 3.1 nm, which is corresponding to an optical modal cavity dimension of 2.5 μm. The device exhibits an enhanced modulation bandwidth of 22.6 GHz and a thermal noise limited laser intensity noise (electrical power spectral density of laser intensity noise below the thermal noise floor -174 dBm/Hz) as a consequence of low power laser operation and reduced mode competition in the microcavity.
Original language | English (US) |
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Article number | 141116 |
Journal | Applied Physics Letters |
Volume | 103 |
Issue number | 14 |
DOIs | |
State | Published - Sep 30 2013 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)