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Francisco Ramos

Publications and source records attributed to Francisco Ramos.

4 recordsLinked to original sources
PubMed2003

Nonlinear distortion generated by semiconductor optical amplifier boosters in analog optical systems.

Closed-form theoretical expressions for the second- and third-order harmonic distortions generated by a semi-conductor optical amplifier (SOA) operating under slight saturation conditions are derived for what is believed to be the first time. The distortion results provided by these expressions agree very well with those obtained by means of simulation and experiments, showing that one should carefully adjust the optical power launched into the SOA to obtain both the good linearity and high dynamic range required by analog optical systems.

Journal Article↗
PubMed2002

Esthesioneuroblastoma: case report.

Esthesioneuroblatoma (ENB) is a rare tumor arising from the olfactory epithelium of the nasal vault which frequently invades the cranial base, cranial vault and orbit. ENB has a bimodal age distribution between 11 and 20 years and between 51 and 60 years. ENB accounts for approximately 1 to 5% of intranasal cancers and no consensus has been reached regarding treatment of this tumor. We report on a 66 year old female patient with a Kadish stage C tumor with frontal lobe invasion submitted a total craniofacial resection with a combined head neck and neurosurgeon team. The purpose of this study is to analyze the natural history, treatment and prognosis of this tumor, based on the literature review.

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