• Proceedings of the KAIS Fall Conference
• /
• 2008.11a
• /
• pp.219-222
• /
• 2008

본 논문에서는 WDM시스템에서 사용될 수 있는 광전치증폭기의 수신감도를 해석하였다. $10^{-9}$의 에러확률에 대하여 FSK전송을 이용하여 비트당 광자수를 계산하여다. 결과로 일반적인 PIN 수신기의 수신감도는 $9.2{\times}10^4$ photon/bit이고, 광전치증폭수신기의 경우는 $7{\times}10^2$의 phton/bit를 갖음을 확인하였다. 또한 FSK전송의 경우에는 표준에러확률인 $10^{-9}$을 유지하기 위해 필요로 하는 비트당 광자의 수를 계산하였는데, 가우시안 근사해석법을 사용한 경우와 정확한 해석법(k자승법)을 이용한 결과 m=30인 경우 k자승법의 경우는 $2.36{\times}10^2$ photon/bit, 가우시안 근사법의 경우에는 $4.01{\times}10^2$ photon/bit을 얻었다. 이를 통해 동일한 BER의 경우에 광전치증폭수신기가 PIN수신기에 비해 우수함을 확인하였다.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.10 no.3
• /
• pp.579-585
• /
• 2006

In this study, we analysis an optical receivers using the optical preamplifier in a spectrum-sliced WDM systems. The average numbers of photons/bit, for an $10^{-9}$ error probability, counts using the OOK and FSK transmission. As a result, the theoretical sensitivity for PIN receiver and optical preamplifier receiver are approximately $9.2\times10^4\;and\;7.2\times10^2$ in the m=20, respectively. Also, the average numbers of photons/bit, for and given error probability, theoretical receiver sensitivity for Gaussian method and k-square method are approximately $9\times10^2\;and\;2.16\times10^2$ in the m=40, respectively. And the average numbers of photons/bit, for an given error probability, theoretical receiver sensitivity, OOK and FSK transmission are approximately $1.9\times10^2\;and\;3.1\times10^2$ in the m=20, respectively.

• Korean Journal of Optics and Photonics
• /
• v.10 no.1
• /
• pp.64-67
• /
• 1999

We have been implemented 10 Gb/s-320 km of dispersion-shifted fiber (DSF) transmission. The optical link consists of a 10 Gb/s optical transceiver, an optical booster amplifier, 3 sets of optical in-line amplifiers, an optical preamplifier and transmission fibers. Firstly, we investigated the Q-factor characteristics in terms of optical signal to noise ratio (OSNR) of 320 km of DSF, measured receiver sensitivity is -27 dBm and power penalty is 2 dB, respectively. We concluded that optical SNR degradation and path penalty gives rise to 1 dB penalty, respectively.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.9
• /
• pp.4462-4466
• /
• 2013

In optical system, the signal and additive noise for statistical properties of a variety of ways to evaluate the performance of the system is essential for the optimization. In this paper, performance analysis of spectrum-sliced optical system in the optical pre-amplifier in the receiver the received signal by including the error limits for the bit that is, the bit error rate (BER: Bit Error Rate) required to maintain the average optical power represents the number of photons per bit is included in this paper to digital form, noticeable signal the receiver to calculate the sensitivity of the method for the calculation was performed. The general strength of the transmission of the modulated signal and digital signal transmission was required for the comparison of optical power. As shown in Figure 3, the general strength of the digital signal transmission system for transmitting a modulated signal compared with the case is improved by at least 10dB.