Relative intensity noise in high speed microcavity laser

F. Tan, M. K. Wu, M. Liu, M. Feng, N. Holonyak

Research output: Contribution to journalArticlepeer-review


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 languageEnglish (US)
Article number141116
JournalApplied Physics Letters
Issue number14
StatePublished - Sep 30 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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