Single-chip CMOS optical microspectrometer

• Autor(a) principal: Correia, J. H.
• Data de Publicação: 2000
• Outros Autores: Graaf, G. de, Kong, S. H., Bartek, M., Wolffenbuttel, R. F.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/4285
• topic: On-chip optical microspectrometer; Microinterferometer; Fabry–Perot etalon; Light-to-frequency converter; internal/external bus interface; Science & Technology

Numerous applications, e.g., systems for chemical analysis by optical absorption and emission line characterization, will benefit from the availability of low-cost single-chip spectrometers. A single-chip CMOS optical microspectrometer containing an array of 16 addressable Fabry–Perot etalons (each one with different resonance cavity length), photodetectors and circuits for read-out, multiplexing and driving a serial bus interface has been fabricated. The result is a chip that can operate using only four external connections (including Vdd and Vss). covering the visible spectral range of the spectrum with FWHM = 18 nm. Frequency output and serial bus interface allow easy multi-sensor, multi-chip interfacing using a microcontroller or a personal computer. Power consumption is 1250 µW for a clock frequency of 1 MHz