The Width-Conversion of an Optical Signal by Using an Erbium-Doped Fiber and an Asymmetric Optical Circuit

Ki-Hwan PARK  Wataru CHUJO  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.3   pp.652-654
Publication Date: 2002/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fiber-Optic Transmission
erbium-doped fiber,  pulse width conversion,  phase shift,  asymmetric circuit,  

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We describe the width conversion of an optical signal by using an erbium-doped fiber and an asymmetric optical circuit. The width of an optical signal was measured to be a respective 350 nsec and 200 nsec for a 70 m and 40 m fiber (Lf). The width of the pumping pulse was 5 nsec and the length of erbium-doped fiber was 3 m. We also extended the optical signals to a respective 300 nsec and 150 nsec wide at a pumping pulse 10 nsec by inserting a 60 m and a 30 m fiber (Lf) inside a circuit.