Observation of wavelength and multiple bistabilities in 850nm Vertical-Cavity Semiconductor Optical Amplifiers (VCSOAs)

Haijiang Zhang, Veronica Gauss, Pengyue Wen, Sadik Esener

Research output: Contribution to journalArticle

14 Scopus citations


Both wavelength bistability (WB) and multiple bistability (MB) were predicted theoretically by Adams' model in resonant optical amplifiers. We report here, for the first time to our knowledge, their experimental observation in 850nm Vertical-Cavity Semiconductor Optical Amplifiers (VCSOA). Clockwise hysteresis of WB is observed at constant input power while the input wavelength is swept across the gain window. MB is observed at a fixed operation wavelength biased on the longwavelength side of the two separated Polarization-Dependent Gain (PDG) windows of the VCSOA by sweeping the optical input. The polarization of the input is set to a fixed angle with respect to the two intrinsic principal axes of the VCSOA. Two MB levels were experimentally observed at 160μW and 320μW, respectively. These observations are in good agreement with theoretical prediction by Adams' model and may lead to multi-valued optical information manipulation.

Original languageEnglish (US)
Pages (from-to)11723-11730
Number of pages8
JournalOptics express
Issue number18
StatePublished - Sep 9 2007


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this