A flat-field broadband spectrograph design

Author

McGreer, K.A.

Author_Institution

Dept. of Phys., Manitoba Univ., Winnipeg, Man., Canada

Volume

7

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

397

Lastpage

399

Abstract

A planar spectrograph design is described that features a flat-field output and operates over a remarkably broad range of wavelengths. The grating facet positions are described by an iterative algorithm that ensures that light will arrive in phase at the focal point. There are no aberrations of any order at the design wavelength and aberrations near the design wavelength are simultaneously minimized. The peak intensity of the output varies less than 3 dB over a wavelength range of 1.46 to 1.64 μm. The spectrograph may be used as a demultiplexer in photonics systems using wavelength division multiplexing. The design easily accommodates hybrid integration of a linear detector array at the output.

Keywords

aberrations; demultiplexing equipment; diffraction gratings; infrared spectrometers; infrared spectroscopy; iterative methods; optical design techniques; optical planar waveguides; wavelength division multiplexing; 1.46 to 1.64 mum; aberrations; demultiplexer; design wavelength; flat-field broadband spectrograph design; flat-field output; focal point; grating facet positions; hybrid integration; in phase; iterative algorithm; linear detector array; peak intensity; photonics systems; planar spectrograph design; wavelength division multiplexing; wavelength range; Arrayed waveguide gratings; Detectors; Differential equations; Diffraction gratings; Gallium arsenide; Indium phosphide; Iterative algorithms; Photonics; Planar waveguides; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.376814

Filename

376814