Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/4881
Título: | Stray-light compensation in thin-film Fabry-Perot optical filters : application to an on-chip spectrometer |
Autor(es): | Bartek, M. Correia, J. H. Kong, S. H. Wolffenbuttel, R. F. |
Palavras-chave: | Stray-light compensation Optical filters |
Data: | 7-Jun-1999 |
Editora: | Institute of Electrical Engineers of Japan |
Citação: | INTERNATIONAL CONFERENCE ON SOLID-STATE, 10, Sendai, 1999 –“Transducers'99”. [Sendai]: Institute of Electrical Engineers of Japan, 1999. p. 240-243. |
Resumo(s): | This paper describes a method for significantly improving the performance of integrated Fabry- Perot- based optical spectral analysers, in terms of spectral selectivity and/or requirements on the input light beam conditioning. The method is based on compensation of the stray-light components induced by the non-idealities of both the incident light beam and a Fabry-Perot (F-P) resonator. The compensation structure consists of the same layer stack as used in the active F-P filter. The difference is that the optical length of the cavity is decreased below λ/10 (<40 nm if applied for measurements in the visible spectral range). This avoids any resonance inside the cavity for the spectral range of interest. However, the parasitic signal that is caused by stray-light transmittance is similar to that of the active channel and can be used for compensation. The method was applied to an array-type on-chip spectrometer operating at the visible spectral range. The spectral selectivity is improved by a factor 10 compared to the device without compensation. Moreover, applicability of the device is enlarged, as the requirements on the measured light beam (e.g. presence of stray-light, light beam divergence, background light levels, etc.) are less demanding. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/4881 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | DEI - Artigos em atas de congressos internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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MB_trans99.pdf | Documento principal | 802,35 kB | Adobe PDF | Ver/Abrir |