title: In-line monitoring technique with visible light from 1.3 microm-band SHG module for optical access systems.
abstract: We propose an in-line monitoring technique that uses 650 nm visible light for performing maintenance work on Fiber-to-the-home (FTTH) network quickly without the need for measuring skills or external devices. This technique is characterized by visible light (650 nm) generated by an SHG module from the 1.3 microm-band line signal. We fabricate a 1.3 microm-band quasi phase matched LiNbO(3) (QPM-LN) module, and the measure the 650 nm second harmonic (SH) power to test the proposed short-pulse modulation method. The results confirm the feasibility of the short-pulse modulation method with different peak factors (PFs) (1.0-7.3). We also examine the effect of short-pulse modulation on system performance at the optical receiver by measuring the bit error rate (BER) of received data (1.25 Gb/s). The BER is basically unaffected by the PF (1.0-5.5). This means that the proposed technique has little influence on data reception as regards PF (1.0-5.5).
authors.affiliation: NTT Access Network Service Systems Laboratories, NTT Corporation, 1-1 Hikarinooka, Yokosuka, Kanagawa 239-0847, Japan. kubo.takahiro@lab.ntt.co.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kubo
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Taniguchi
authors.forename: Osamu
authors.initials: O
authors.lastname: Tadanaga
authors.forename: Naoya
authors.initials: N
authors.lastname: Sakurai
authors.forename: Hideaki
authors.initials: H
authors.lastname: Kimura
authors.forename: Hisaya
authors.initials: H
authors.lastname: Hadama
authors.forename: Masaki
authors.initials: M
authors.lastname: Asobe