Electronics Letters · 1989 · 29 citations · 0 references
EngineeringElectrical EngineeringOpticsOptoelectronicsPhotonicsIntegrated OpticsIntegrated PhotonicsOptical WaveguidesPhotonic Integrated CircuitsSilicon PhotonicsDemultiplexersIntegrated Optical WaveguidesIntegrated Waveguide CircuitsIntegrated WaveguidesInternal ReflectionSignal-to-noise RatioTotal Internal ReflectionWaveguide Integration
The performance of a monolithic spectrometer operating by total internal reflection of a slab-guided mode from vertical dry-etched mirrors is reported. Device outputs are almost diffraction-limited and exhibit a signal-to-noise ratio of 15–20 dB. Losses for the collimating mirrors and the grating are 2 and 2.5 dB, respectively.