Mach-Zehnder switch using an ultra-compact directional coupler in a strongly-confining rib structure

C. F. Janz, B. P. Keyworth, W. Allegretto, R. I. MacDonald, Mahmoud Fallahi, G. Hillier, C. Rolland

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A quantum well Mach-Zehnder switch operating at 1.55 μm, fabricated in a strongly-confining rib waveguide structure, and employing a multi-mode 3-dB output coupler only 40 μm long, is described. The device yields almost 10 dB of contrast between outputs at 3 V bias, with 4.3 dB of excess coupler loss. The total cleaved device length is only 1.5 mm, and high bandwidth (15 GHz) operability is anticipated. A simple computer model of the coupler is in good agreement with the measured results, and predicts enhanced performance with a small increase in the coupler length.

Original languageEnglish (US)
Pages (from-to)981-983
Number of pages3
JournalIEEE Photonics Technology Letters
Volume6
Issue number8
DOIs
StatePublished - Aug 1994
Externally publishedYes

Fingerprint

Directional couplers
directional couplers
confining
Semiconductor quantum wells
couplers
Mach number
Waveguides
switches
Switches
Bandwidth
output
quantum wells
waveguides
bandwidth

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)
  • Atomic and Molecular Physics, and Optics

Cite this

Mach-Zehnder switch using an ultra-compact directional coupler in a strongly-confining rib structure. / Janz, C. F.; Keyworth, B. P.; Allegretto, W.; MacDonald, R. I.; Fallahi, Mahmoud; Hillier, G.; Rolland, C.

In: IEEE Photonics Technology Letters, Vol. 6, No. 8, 08.1994, p. 981-983.

Research output: Contribution to journalArticle

Janz, C. F. ; Keyworth, B. P. ; Allegretto, W. ; MacDonald, R. I. ; Fallahi, Mahmoud ; Hillier, G. ; Rolland, C. / Mach-Zehnder switch using an ultra-compact directional coupler in a strongly-confining rib structure. In: IEEE Photonics Technology Letters. 1994 ; Vol. 6, No. 8. pp. 981-983.
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