Electrically controlled optical-mode switch for fundamental mode and first order mode

Ryan Imansyah, Tatsushi Tanaka, Luke Himbele, Haisong Jiang, Kiichi Hamamoto

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We have proposed an optical mode switch, the principle of which is based on the partial phase shift of injected light; therefore, one important issue is to clarify the proper design criteria for the mode combiner section. We focused on the bending radius of the S-bend waveguide issue that is connected to the multi mode waveguide in the Y-junction section that acts as mode combiner. Long radius leads to undesired mode coupling before the Y-junction section, whereas a short radius causes radiation loss. Thus, we simulated this mode combiner by the beam-propagation method to obtain the proper radius. In addition, we used a trench pin structure to simplify the fabrication process into a single-step dry-etching process. As a result, we successfully fabricated an optical-mode switch with the bending radius R = 610 m. It showed the successful electrical mode switching and the achieved mode crosstalk was approximately %10 dB for 1550nm wavelength with the injection current of 60mA (5.7 V).

Original languageEnglish
Article number08RB06
JournalJapanese journal of applied physics
Issue number8
Publication statusPublished - Aug 2016

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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