Gain variation induced by power transient in thulium-doped fiber amplifier at 2 µm and its reduction by optical gain clamping technique

The effect of injecting of C-band amplified spontaneous emission (ASE) from C-band erbium-doped fiber amplifier (EDFA) on the performance of L-band EDFA is demonstrated using a circulator and broadband fiber Bragg grating (FBG). Injecting a large amount of ASE (VOA=0 dB) clamps the gain at 15.2 dB from -40 to -10 dBm with a gain variation of less than 0.3 dB. Injecting a small amount of ASE (attenuation of 20 dB and above) improves the small signal gain with a negligible noise figure penalty compared to that of an amplifier without the ASE injection. A maximum gain improvement of 3.5 dB is obtained at an attenuation of 20 dB. These results show that the ASE injection technique can be used either for gain improvement or gain clamping in L-band EDFA.

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Investigation of Raman fiber amplifier with all-optical gain clamping ring

10.1117/12.480598 ◽

2002 ◽

Cited By ~ 1

Author(s):

Yandong Gong ◽

Ping Shum ◽

Chao Lu ◽

Tee Hiang Cheng ◽

Xiang Zhou ◽

...

Keyword(s):

Optical Gain ◽

Fiber Amplifier ◽

Gain Clamping ◽

All Optical ◽

Raman Fiber Amplifier

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Reduction of Cross-Gain Modulation in a Fiber Optical Parametric Amplifier by Using All-Optical Gain Clamping

Latin America Optics and Photonics Conference ◽

10.1364/laop.2010.pdptuk3 ◽

2010 ◽

Cited By ~ 1

Author(s):

R. Malik ◽

M. E. Marhic

Keyword(s):

Optical Gain ◽

Parametric Amplifier ◽

Optical Parametric Amplifier ◽

Gain Modulation ◽

Optical Parametric ◽

Cross Gain Modulation ◽

Gain Clamping ◽

All Optical ◽

Fiber Optical ◽

Fiber Optical Parametric Amplifier

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Investigation and optimization of EYDFA + Raman + EYDFA hybrid optical amplifier for SD-WDM systems in C+L band

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863521500065 ◽

2021 ◽

pp. 2150006

Author(s):

Anurupa Lubana ◽

Sanmukh Kaur

Keyword(s):

Wavelength Division Multiplexing ◽

Signal To Noise Ratio ◽

Fiber Amplifier ◽

Optical Amplifier ◽

Optical Signal ◽

Channel Spacing ◽

Channel System ◽

Wavelength Division ◽

Gain Variation ◽

Hybrid Optical Amplifier

In this paper, we present a novel erbium–ytterbium doped fiber amplifier (EYDFA) + Raman + EYDFA hybrid optical amplifier (HOA) for a super-dense wavelength division multiplexing (SD-WDM) system application. The performance of the 100-channel system has been investigated for an overall data rate and channel spacing of 100[Formula: see text]Gb/s and 0.4[Formula: see text]nm, respectively, over a wavelength span of 1550–1589.9[Formula: see text]nm. HOA has been optimized for Raman length, EYDFA lengths, pump powers and Er[Formula: see text] concentrations to achieve high average gain and low gain variation ratio of 40.41[Formula: see text]dB and 0.40[Formula: see text]respectively. The optimized configuration of the proposed HOA has been compared with EYDFA + Raman and Raman + EYDFA HOA configurations. The achieved high and flat gain with an acceptable output optical signal to noise ratio (OSNR) in case of EYDFA + Raman + EYDFA HOA; makes it an optimum choice for SD-WDM systems.

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