Rapidly tunable narrowband wavelength filter using LiNbO/sub 3/ unbalanced Mach-Zehnder interferometers

Rapidly tunable narrowband wavelength filter using LiNbO/sub 3/ unbalanced Mach-Zehnder interferometers

We demonstrate a rapidly tunable narrowband wavelength filter using unbalanced Mach-Zehnder interferometers in lithium niobate. It is designed to switch among eight channels spaced 50 GHz apart in optical frequency (approximately 0.4 nm in wavelength) in less than 50 ns. The insertion loss is 19 dB...

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Veröffentlicht in:Journal of lightwave technology 1996-11, Vol.14 (11), p.2530-2536
Hauptverfasser: Wooten, E.L., Stone, R.L., Miles, E.W., Bradley, E.M.
Format: Artikel
Sprache:eng
Schlagworte:
Frequency
Lithium niobate
Narrowband
Optical crosstalk
Optical design
Optical feedback
Optical filters
Optical interferometry
Optical switches
Tunable circuits and devices
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Beschreibung
Zusammenfassung:We demonstrate a rapidly tunable narrowband wavelength filter using unbalanced Mach-Zehnder interferometers in lithium niobate. It is designed to switch among eight channels spaced 50 GHz apart in optical frequency (approximately 0.4 nm in wavelength) in less than 50 ns. The insertion loss is 19 dB and crosstalk is less than -22 dB. The filter consists of a cascade of three electrooptically tunable unbalanced Mach-Zehnders and a feedback circuit to keep the filter centered on the desired wavelength.
ISSN:0733-8724
1558-2213
DOI:10.1109/50.548151