Abstract

Compact, high-performance optical components are much sought after in modern observational astronomy to bring down the system cost and maintenance complexity. Lightweight, miniature spectrometers are also essential components for instruments used in satellite and space observation. Integrated spectrometers based on planar light wave circuits are attractive as such compact device can provide high spectral resolution and simultaneously also provide great robustness and flexibility in spectrograph system design. Though arrayed waveguide gratings (AWGs) have been demonstrated for such purposes, the application is limited by their working principles: 1) The operation wavelengths are mostly constrained in the near infrared (NIR) region.

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