Grating spectrograph integrated with photodiode array in InGaAsP/InGaAs/InP

Grating spectrograph integrated with photodiode array in InGaAsP/InGaAs/InP

A grating spectrograph integrated monolithically for the first time in the InGaAsP system with a photodiode array for a dense WDM application is presented for the 1.5 mu m wavelength region. The chip provides 42 wavelength channels with a spacing of 4 mm, a channel crosstalk of approximately -15 dB,...

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Veröffentlicht in:IEEE photonics technology letters 1992-01, Vol.4 (1), p.108-110
Hauptverfasser: Cremer, C., Emeis, N., Schier, M., Heise, G., Ebbinghaus, G., Stoll, L.
Format: Artikel
Sprache:eng
Schlagworte:
Etching
Gratings
Indium gallium arsenide
Indium phosphide
Metallization
Optical filters
Optical waveguides
Photodiodes
Slabs
Wavelength division multiplexing
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Zusammenfassung:A grating spectrograph integrated monolithically for the first time in the InGaAsP system with a photodiode array for a dense WDM application is presented for the 1.5 mu m wavelength region. The chip provides 42 wavelength channels with a spacing of 4 mm, a channel crosstalk of approximately -15 dB, an internal photodiode efficiency of 90%, and a photodiode capacitance of 0.33 pF. The chip needs no optical adjustments. It is therefore well suited for mass production.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.124893