Title :
Low-power absorption-type germanium thermo-optic modulator
Author :
Kuo, Yau-Hwang ; Chen, Tzer-Long
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A vertical thermo-optic modulator based on temperature-dependent absorption is demonstrated on a Ge resistive-heating structure. The contrast ratio is 5.4 dB peaked at 1553 nm and exceeds 3 dB for 15 nm range under a 1 V low operation voltage (0.7 mW heating power). With heating power increases from 0.7 to 4 mW, the response time reduces from 600 to 240 ns, and the peak contrast reaches 7.1 dB at 1554.4 nm.
Keywords :
elemental semiconductors; germanium; integrated optics; light absorption; optical modulation; thermo-optical devices; Ge; heating power; low-power absorption-type thermo-optic modulator; operation voltage; power 0.7 mW to 4 mW; resistive-heating structure; temperature-dependent absorption; time 240 ns; time 600 ns; voltage 1 V; wavelength 15 nm; wavelength 1553 nm; wavelength 1554.4 nm;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2010.1898
