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Title: Compact electro-absorption modulator integrated with vertical-cavity surface-emitting laser for highly efficient millimeter-wave modulation

We demonstrate a compact electro-absorption slow-light modulator laterally-integrated with an 850 nm vertical-cavity surface-emitting laser (VCSEL), which enables highly efficient millimeter-wave modulation. We found a strong leaky travelling wave in the lateral direction between the two cavities via widening the waveguide width with a taper shape. The small signal response of the fabricated device shows a large enhancement of over 55 dB in the modulation amplitude at frequencies beyond 35 GHz; thanks to the photon-photon resonance. A large group index of over 150 in a Bragg reflector waveguide enables the resonance at millimeter wave frequencies for 25 μm long compact modulator. Based on the modeling, we expect a resonant modulation at a higher frequency of 70 GHz. The resonant modulation in a compact slow-light modulator plays a significant key role for high efficient narrow-band modulation in the millimeter wave range far beyond the intrinsic modulation bandwidth of VCSELs.
Authors:
 [1] ; ;  [2] ;  [1] ;  [3]
  1. Precision and Intelligence Laboratory, Photonics Integration System Research Center, Tokyo Institute of Technology, 4259-R2-22 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503 (Japan)
  2. Department of Physics, Faculty of Science, King Abdulaziz University, 80203 Jeddah 21589 (Saudi Arabia)
  3. (Saudi Arabia)
Publication Date:
OSTI Identifier:
22310938
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; AMPLITUDES; BRAGG REFLECTION; CAVITY RESONATORS; GHZ RANGE; LASERS; MODULATION; PHOTONS; RESONANCE; SIMULATION; SURFACES; TRAVELLING WAVES; VISIBLE RADIATION; WAVEGUIDES