Gain-clamped dual-stage L-band EDFA by using backward C-band ASE

Jin, Yanli; Dou, Qingying; Liu, Yange; Liu, Jianguo; Xu, Lingling; Yuan, Shuzhong; Dong, Xinyong

doi:10.1016/j.optcom.2006.05.006

Cited by 10 publications

(2 citation statements)

References 7 publications

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“…With the development of fiber technology, the erbium-doped fiber amplifier (EDFA) technology has been widely used in fiber communication system, and some filtering technologies are reported about how to realize multi-signal power equalization [1][2][3][4]. Contrary to the EDFA inhibiting fluorescence, the erbium-doped fiber amplified spontaneous emission (ASE) source (also can be called super-fluorescent fiber source) make full use of the fluorescence, and make this kind light become super-fluorescence by amplifying the spontaneous emission.…”

Section: Introductionmentioning

confidence: 99%

Flattening the Spectrum of Erbium-Doped Fiber ASE Source Combining with LPFG-Based Filter Technique

Wang

Yan

Han

et al. 2013

AMR

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Through studying the basic principle of super-fluorescent fiber source and combining with internal and external gain flattening technique, the spectral flatness of erbium-doped fiber amplified spontaneous emission (ASE) source with two-stage double-pass configuration pumped by two laser diodes (LDs) is improved. By optimizing the lengths of two-stage erbium-doped fiber (EDF) and adjusting the pump power of two LDs,the powers of C-band and L-band are matching, and the spectral flatness is superior to 0.5dBm from 1535 to 1610 nm. Utilizing the long period fiber grating (LPFG)-based thermally-insensitive gain flattening filter (GFF) fabricated by ourselves, the spectral protrusion is flattened near the peak of absorption wavelength of EDF, which make the spectrum not only cover the range of C-band and L-band, also realize the spectral flatness is better than 0.8dBm in the range of 3dB bandwidth. Application of the fiber ASE source in fiber Bragg grating sensing system could decrease the multi-signal peak power imbalance.

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Section: Introductionmentioning

confidence: 99%

Flattening the Spectrum of Erbium-Doped Fiber ASE Source Combining with LPFG-Based Filter Technique

Wang

Yan

Han

et al. 2013

AMR

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“…C-band, from 1530 to 1560 nm) [4,5]. An alternative to attaining L-band EDFA with clamped gain is utilizing unwanted backward ASE as a secondary pump source [6]. This ASE generated by a C-band portion of an EDFA system can be recycled to improve the L-band gain performance by generating a C-plus L-band EDFA.…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Automatic-Power-Controlled and Gain-Clamped EDFA for Broadband Passive Optical Networking Systems

Shen¹,

Wei²,

Lin³

et al. 2010

J Infrared Milli Terahz Waves

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The configuration of a simple improved high efficiency automatic-powercontrolled and gain-clamped EDFA (APC-GC-EDFA) for broadband passive optical networking systems (BPON) is presented here. In order to compensate the phase and amplitude variation due to the different distance between the optical line terminal (OLT) and optical network units (ONU), the APC-GC-EDFA need to be employed. A single 980 nm laser module is employed as the primary pump. To extend the bandwidth, all Cband ASE is recycled as the secondary pump to enhance the gain efficiency. An electrical feedback circuit is used as a multi-wavelength channel transmitter monitor for the automatic power control to improve the gain-flattened flatness for stable amplification. The experimental results prove that the EDFA system can provide flatter clamped gain in both C-band and L-band configurations. The gain flatness wavelength ranging from 1530 to 1610 nm is within 32.83±0.64 dB, i.e. below 1.95 %. The gains are clamped at 33.85±0.65 dB for the input signal power of −40 dBm to −10 dBm. The range of noise figure is between 6.37 and 6.56, which is slightly lower compared to that of unclamped amplifiers. This will be very useful for measuring the gain flatness of APC-GC-EDFA. Finally, we have also demonstrated the records of the overall simultaneous dynamics measurements for the new system stabilization. The carrier to noise ratio (CNR) is 49.5 to 50.8 dBc which is above the National Television System Committee (NTSC) standard of 43 dBc, and both composite second order (CSO) 69.2 to 71.5 dBc and composite triple beat (CTB) of 69.8 to 72.2 dBc are above 53 dBc. The recorded corresponding rise-time of 1.087 ms indicates that the system does not exhibit any overshoot of gain or ASE variation due to the signal at the beginning of the pulse.

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Dual-stage L-band erbium-doped fiber amplifier with distributed pumping from single pump laser

Yusoff

Abas

Hitam

et al. 2012

Optics Communications

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Gain-clamped dual-stage L-band EDFA by using backward C-band ASE

Cited by 10 publications

References 7 publications

Flattening the Spectrum of Erbium-Doped Fiber ASE Source Combining with LPFG-Based Filter Technique

Flattening the Spectrum of Erbium-Doped Fiber ASE Source Combining with LPFG-Based Filter Technique

High Efficiency Automatic-Power-Controlled and Gain-Clamped EDFA for Broadband Passive Optical Networking Systems

Dual-stage L-band erbium-doped fiber amplifier with distributed pumping from single pump laser

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