Loading...
Please wait, while we are loading the content...
Similar Documents
2 dB Reduction Of Transmission Penalty By Self - Phase Modulation In A 5 Gbit/s FM/AM Conversion System Experiment
| Content Provider | Semantic Scholar |
|---|---|
| Author | Foged, Bo Skullerud, Johan Gudmann, Carsten |
| Copyright Year | 2016 |
| Abstract | The transmission penalty of a standard non-dispersion shifted fiber is experimentally demonstrated t o be reduced by SelfPhase Modulation due to the optical Kerr effect. A 2 dB reduction of transmission penalty is achieved in a 5 Gbit/s FM/AM conversion system experiment over 205 km of fiber. Introduction: The group velocity dispersion penalty of an optical communication system depends to some extent on the frequency chirp of the transmitted signal. One way to diminish the dispersion penalty in linear systems is by introducing a suitable chirp in the transmitted signal in order to obtain less dispersive pulse distortion [11-[41. In systems with high-power transmitters, the interaction between Self-phase Modulation (SPM) due to the optical Kerr effect and the group velocity dispersion has to be taken into account. In order to demonstrate the effect of this interaction, we report observation of transmission penalty dependence of Self-phase Modulation in a 205 km system experiment. The system employs a 5 Gbit/s frequency modulation (FM) to amplitude modulation (AM) conversion transmitter. A 2 dB reduction of transmission penalty with this modulation scheme is experimentally achieved by increasing the transmitter output power from +7 dBm to +14 dBm. Experimental Set-up: The experimental set-up is shown schematically in Fig. 1. A threeelectrode U4-shifted DFB laser with a 10 GHz FM-response bandwidth is used as transmitter [51. The laser is operated at a wavelength of 1548 nm and the linewidth is 2 MHz. The laser is modulated directly from the word generator with a 5 Gbit/s Pseudo Random Binary Sequence of length 27-l. The Continuos Phase Frequency Shift Keying (CP-FSK) signal of the transmitter laser is converted into an AM signal by the Mach-Zehnder interferometer (MZI). The differential delay of the MZI is z = 42 ps. An Erbium Doped Fiber (EDF) booster amplifier with a saturated output power of +15 dBm is used in the transmitter. The level of the transmitter output power is adjusted by an optical attenuator. The receiver is an optically preamplified pindetector receiver. The two stage EDF preamplifier is pumped at 980 nm. The fiber-to-fiber gain (including input and output connector insertion loss) is 34 dB and the corresponding noise figure is 4 dB. An optical Fabry-Perot filter with a 3 dB bandwidth of 20 GHz ensures that the noise in the receiver is dominated by signal-spontaneous emission beat noise. The filter is locked to the signal by an Automatic Frequency Control (AFC). The periodic frequency response of the Fabry-Perot filter is eliminated by a broadband optical bandpass filter with a bandwidth of 2.5 nm. A fourthorder Bessel filter with 3 dB cut-off frequency of 4 GHz is used as post-detection filter. The Bit Error Rate (BER) is measured with the error counter which is synchronized by a clock signal recovered by the receiver. 205 km of standard non-dispersion shifted optical fiber is inserted in between the transmitter and the receiver. This fiber length is chosen as a compromise between the available dynamic range of input power and the amount BMrmWW ! .... ~~ ..... .... ................... .. .... ~1 Figure 1. Experimental set-up. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://orbit.dtu.dk/files/4506610/Bo.pdf |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=standard |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=harvard |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=vancouver |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=apa |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=short |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=long |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=mla |
| Alternate Webpage(s) | http://orbit.dtu.dk/en/publications/2-db-reduction-of-transmission-penalty-by-self--phase-modulation-in-a-5-gbits-fmam-conversion-system-experiment(646be38f-4b60-40e7-b0a0-f5425c29890d).pdf?nofollow=true&rendering=author |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
