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Title: Thermally tuneable optical modulator adapted for differential signaling

An apparatus for optical modulation is provided. The apparatus includes a modulator structure and a heater structure. The modulator structure comprises a ring or disk optical resonator having a closed curvilinear periphery and a pair of oppositely doped semiconductor regions within and/or adjacent to the optical resonator and conformed to modify the optical length of the optical resonator upon application of a bias voltage. The heater structure comprises a relatively resistive annulus of semiconductor material enclosed between an inner disk and an outer annulus of relatively conductive semiconductor material. The inner disk and the outer annulus are adapted as contact regions for a heater activation current. The heater structure is situated within the periphery of the optical resonator such that in operation, at least a portion of the resonator is heated by radial conductive heat flow from the heater structure. The apparatus further includes a substantially annular isolation region of dielectric or relatively resistive semiconductor material interposed between the heater structure and the modulator structure. The isolation region is effective to electrically isolate the bias voltage from the heater activation current.
Issue Date:
OSTI Identifier:
Sandia Corporation SNL-A
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2014 Jan 09
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
Country of Publication:
United States

Works referenced in this record:

Highly-efficient thermally-tuned resonant optical filters
journal, January 2010
  • Cunningham, John; Shubin, Ivan; Zheng, Xuezhe
  • Optics Express, Vol. 18, Issue 18, p. 19055-19063
  • DOI: 10.1364/OE.18.019055

Vertical junction silicon microdisk modulators and switches
journal, January 2011
  • Watts, Michael; Zortman, William; Trotter, Douglas
  • Optics Express, Vol. 19, Issue 22, p. 21989-22003
  • DOI: 10.1364/OE.19.021989