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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 18313–18318

Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer

B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder  »View Author Affiliations


Optics Express, Vol. 20, Issue 16, pp. 18313-18318 (2012)
http://dx.doi.org/10.1364/OE.20.018313


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Abstract

We present a new synchronized design for flattening the passband of an arrayed-waveguide grating (AWG) over a broad wavelength range of 90 nm. A wavelength-insensitive 3-dB balanced coupler is designed to be used in duplicate in a Mach-Zehnder interferometer (MZI); the phase deviation created by one of the balanced couplers is cancelled by flipping the other coupler around. This MZI is arranged in tandem with the AWG such that the output signal of the MZI is the input signal of the AWG. We demonstrate a 5-channel, 18-nm-spacing AWG with a 0.5-dB bandwidth of 12 nm over a 90-nm spectral range. A low-loss cascaded AWG system is demonstrated by using the MZI-synchronized flat-top AWG as a primary filter.

© 2012 OSA

OCIS Codes
(230.3120) Optical devices : Integrated optics devices
(080.1238) Geometric optics : Array waveguide devices

ToC Category:
Optical Devices

History
Original Manuscript: June 6, 2012
Revised Manuscript: July 18, 2012
Manuscript Accepted: July 20, 2012
Published: July 25, 2012

Citation
B. I. Akca, C. R. Doerr, G. Sengo, K. Wörhoff, M. Pollnau, and R. M. de Ridder, "Broad-spectral-range synchronized flat-top arrayed-waveguide grating applied in a 225-channel cascaded spectrometer," Opt. Express 20, 18313-18318 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-16-18313


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