A method for measuring the frequency response of photodetector modules using twice-modulated light

Author

Yoshioka, Masahiro ; Sato, Sojun ; Kikuchi, Tsuneo

Author_Institution

Nat. Metrol. Inst. of Japan, Tsukuba, Japan

Volume

23

Issue

6

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

2112

Lastpage

2117

Abstract

In this paper, a novel method is proposed for measuring the frequency response of a photodetector (PD) and its associated amplifier, which is called a PD module in this paper, by using light whose intensity is modulated twice. A distinctive feature of the twice-modulated light is that it contains two frequency components that essentially have equal intensities. A measurement system was constructed consisting of an He-Ne laser source and two acoustooptic modulators to verify the method. This study shows the resolution to a problem caused by the use of acoustooptic modulators (AOMs). This method can be readily used for determining the frequency responses of a PD module in the frequency range of up to tens of megaHertz.

Keywords

acousto-optical modulation; frequency measurement; photodetectors; He-Ne; acoustooptic modulators; amplifier; frequency response measurement; photodetector modules; twice-modulated light; Frequency measurement; Frequency response; High speed optical techniques; Intensity modulation; Measurement uncertainty; Optical interferometry; Optical mixing; Optical modulation; Optical sensors; Photodetectors; Frequency response; measurement uncertainty; photodetector (PD); twice-modulated light;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2005.846905

Filename

1440519