Answers are grounded in this paper and cite their sources.
A monolithic InP-based grating spectrometer for use in wavelength-division multiplexed systems at 1.5 μm is reported. The spectrometer uses a single etched reflective focusing diffraction grating and resolves > 50 channels at 1nm spacing with a ~0.3 nm channel width and at least 19 dB channel isolation. Operation is essentially of the state of the input polarisation.
No takes yet. Share an insight, caveat, or question.
Soole et al. (1991) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: