Effects of Back-Reflection in WDM-PONs Based on Seed Light Injection

Moon, Jung-Hyung; Choi, Kang‐Hoon; Mun, Sil-Gu; Lee, Changhee

doi:10.1109/lpt.2007.909633

Cited by 45 publications

(14 citation statements)

References 6 publications

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“…Further increasing the reflection value up to −22 dB, we could see a slight power penalty of 0.2 dB for the downstream transmission. It is worth noting that these results agree well with previously reported announcements by other research groups [33,34]. As shown in Fig.…”

Section: Transmission Impairmentssupporting

confidence: 93%

Loop-Back WDM-PON With 100 Gb/s Capacity Using Spectrally Sliced ASE Injected RSOA

Cho

Lee

et al. 2013

J. Opt. Commun. Netw.

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We experimentally investigated the 1.25 Gb∕s operation of a spectrally sliced amplified spontaneous emission (ASE) injected reflective semiconductor optical amplifier (RSOA) with 50 GHz channel spacing using an injection current adjustment, dispersion management, and the use of an optical receiver with an optimized decision threshold level. We mitigated the relative intensity noise (RIN) degradation caused by post-filtering through the injection current adjustment, and also alleviated the dispersion-induced RIN degradation with the help of the dispersion management method. Finally, the use of an optical receiver with an optimized decision threshold level eliminated error floors, which were attributed to an unequal noise distribution between the mark level and the space level. We also successfully demonstrated a loop-back wavelength division multiplexing-passive optical network (WDM-PON) with a 100 Gb∕s (80 × 1.25 Gb∕s) capacity using a spectrally sliced ASE injected RSOA by means of the three aforementioned methods. We also analyzed and examined the transmission impairments, such as the dispersion penalty and back-reflection induced penalty, in a 1.25 Gb∕s bidirectional WDM-PON based on an RSOA with 50 GHz channel spacing.

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Section: Transmission Impairmentssupporting

confidence: 93%

Loop-Back WDM-PON With 100 Gb/s Capacity Using Spectrally Sliced ASE Injected RSOA

Cho

Lee

et al. 2013

J. Opt. Commun. Netw.

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“…Thus, we can extend the transmission length with a high power BLS. The demonstrated WDM-PON also shows a robust transmission performance on the optical back reflection [34]. Moreover, the transmission length can be extended further by employing a forward error correction (FEC).…”

Section: Recent Research and Developmentmentioning

confidence: 99%

WDM-PON Based on Wavelength Locked Fabry-Perot LDs

Lee¹,

Mun²

2008

Journal of the Optical Society of Korea

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A WDM-PON has been considered as an ultimate solution for access networks. However, there were many technical and practical issues for commercial deployment. These issues were solved with wavelength locked F-P LD and the WDM-PONs employing this optical source were commercialized. These WDM-PON systems have been deployed in Korea, Europe, and US. We reviewed wavelength locking technology and WDM-PON achievements. When we inject spectrum sliced broadband light into an F-P LD, the multimode output is changed to a quasi single mode. Then, we can use the single mode light for WDM signal transmission. The broad spectral gain of the semiconductor gain medium enables a color-free operation of WDM-PON, i.e., an identical ONT can be used for each user. The wavelength locking properties depend on many parameters, especially alignment of injection wavelength to a lasing mode, passband profile of AWG and front facet reflectivity of F-P LD. However, these dependencies can be reduced by proper design of the laser and the injection bandwidth. Thus, WDM-PON systems have been achieved with color-free operation.

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“…In such a WDM transmission system with burst packets, dynamic optical level control would be very important for suppressing fast gain transients and equalizing gain variations among wavelength channels in erbium-doped fiber amplifiers (EDFAs). To address these issues, implementation of variable optical attenuators (VOAs) has been under intensive investigations for level control of signals [1][2][3]. Although all-optical feedback loops directly linked to EDFAs can control gain transient tilt [4], signal equalization for individual channels is more effective for compensating complicated gain spectrum tilt.…”

Section: Introductionmentioning

confidence: 99%

Optical power stabilization using a germanium photodiode and a variable optical attenuator integrated on a silicon wire waveguide platform

Yamada

Tsuchizawa

Watanabe

et al. 2010

7th IEEE International Conference on Group IV Photonics

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We have demonstrated fast optical power stabilization using a germanium photodiode and a silicon variable optical attenuator monolithically integrated on a compact silicon photonic platform. These integrated devices work synchronously with a ~100-MHz bandwidth. With an external electronic feedback circuit, the output power of the device is stabilized within an error of 3.7 dB for 20-dB input power variation. Feedback response time is about 100 ns.

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Effects of Back-Reflection in WDM-PONs Based on Seed Light Injection

Cited by 45 publications

References 6 publications

Loop-Back WDM-PON With 100 Gb/s Capacity Using Spectrally Sliced ASE Injected RSOA

Loop-Back WDM-PON With 100 Gb/s Capacity Using Spectrally Sliced ASE Injected RSOA

WDM-PON Based on Wavelength Locked Fabry-Perot LDs

Optical power stabilization using a germanium photodiode and a variable optical attenuator integrated on a silicon wire waveguide platform

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