Optical Preamplifier Using Optical Modulation of Amplified Spontaneous Emission in Saturated Semiconductor Optical Amplifier

Yamatoya, Takeshi; Koyama, Fumio

doi:10.1109/jlt.2004.827670

Cited by 19 publications

(9 citation statements)

References 18 publications

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“…These show good agreements with Ref. [16], as faster response were obtained at higher bias currents.…”

Section: Article In Presssupporting

confidence: 90%

“…At 500 mA bias current, high ASE noise is observed. At optimum bias current 400 mA, the ASE noise power is 227 mW at À20 dBm which is less as compared to [16]. We also measured the gain of optical amplifier for different input signal power as shown in Fig.…”

Section: Soa Model and Validationmentioning

confidence: 99%

“…Shot noise N shot , signal to spontaneous beat noise N sÀsp and spontaneous to spontaneous beat noise N spÀsp are depended on photo equivalent current given: by [2,16]:…”

Section: Article In Pressmentioning

confidence: 99%

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Simulation of DWDM signals using optimum span scheme with cascaded optimized semiconductor optical amplifiers

Singh¹,

Kaler²

2007

Optik

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“…These show good agreements with Ref. [16], as faster response were obtained at higher bias currents.…”

Section: Article In Presssupporting

confidence: 90%

Section: Soa Model and Validationmentioning

confidence: 99%

See 1 more Smart Citation

Simulation of DWDM signals using optimum span scheme with cascaded optimized semiconductor optical amplifiers

Singh¹,

Kaler²

2007

Optik

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“…The small signal gain ranges from 35.56 dB to 33.25 dB for input signal ranging from −40 dBm to +10 dBm. The optimum bias current is evaluated to be 400 mA, which is in agreement with the results reported previously [10,11], as faster response was obtained at higher bias currents. The input and output coupling losses of SOAs are taken as 3 dB.…”

Section: Soa Parameterssupporting

confidence: 87%

Wide-Band Optical Wavelength Converter Based on Four-Wave Mixing Using Optimized Semiconductor Optical Amplifier

Singh

Kaler

2006

Fiber and Integrated Optics

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We have simulated 50 nm up and down wavelength conversion for a non-return to zero differential phase shift keying (NRZ-DPSK) signal using four-wave mixing in an optimized semiconductor optical amplifier (SOA) at 10 Gb/s for the first time. For this we optimized the SOA parameters to achieve sufficient quality and enhancement in fourwave mixing effect. This can be done in such a manner that the SOA never saturates and produces maximum four-wave mixing signals with minimum gain fluctuations. The quality of the converted signal is best before the saturation of SOA. Finally, we have numerically simulated cascaded wavelength converters up to 1300 km transmission distance.

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“…The gain of SOA is ranging from 37.99 dB to 36.22 dB for input signal −40 dBm to +10 dBm. The optimum injection current is evaluated to be 400 mA [15], which is same as reported in Yamatoya and Koyama [17], as faster response was obtained at higher bias currents. The optical bandwidth of SOA is 40 nm and considered spontaneous emission factor is 2.…”

Section: Soa Parametersmentioning

confidence: 99%

Minimization of Cross-Gain Saturation in Wavelength Division Multiplexing by Optimizing Differential Gain in Semiconductor Optical Amplifiers

Singh

Kaler

2006

Fiber and Integrated Optics

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We successfully simulated the 10 × 40 Gbit/s soliton RZ-DPSK WDM signals over 1050 km with spectral efficiency approaching 0.4 bit/s/Hz using semiconductor optical amplifiers (SOAs) as in-line amplifier. The cross-gain saturation of SOA can be minimized by settling crosstalk at a lower level by decreasing the differential gain. This decrease in differential gain is in such a way that we get nil power penalty. The maximum transmission distance of 1050 km is possible with differential gain 210 atto cm 2 of SOA.The impact of amplification factor, ASE noise power, crosstalk, quality factor and bit error rate for different differential gain has been investigated. It has been shown that with the increase in differential gain of SOA, the transmission distance goes on decreasing. At high value of differential gain 2.5 × 10 −16 cm 2 for the transmission distance 1050 km, all channels produce inter channel crosstalk with bit error rate greater than 10 −6 . But for lower differential gain 190 atto cm 2 , the quality of all channel increases at the cost of large power penalty.With slight increase in differential gain 200 atto cm 2 , the maximum transmission distance observed is 4550 km with quality of received signal more than 15 dB and having nil power penalty. We observed clear eye diagrams and optical power spectra for received signal with transmission distance 1050 km and 4550 km using soliton RZ-DPSK system. The bit error rate for all channels increase more than 10 −10 with the increase in launched input power that is due to power saturation.

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Optical Preamplifier Using Optical Modulation of Amplified Spontaneous Emission in Saturated Semiconductor Optical Amplifier

Cited by 19 publications

References 18 publications

Simulation of DWDM signals using optimum span scheme with cascaded optimized semiconductor optical amplifiers

Simulation of DWDM signals using optimum span scheme with cascaded optimized semiconductor optical amplifiers

Wide-Band Optical Wavelength Converter Based on Four-Wave Mixing Using Optimized Semiconductor Optical Amplifier

Minimization of Cross-Gain Saturation in Wavelength Division Multiplexing by Optimizing Differential Gain in Semiconductor Optical Amplifiers

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