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High Performance Polarisation Independent RSOAs in the S,C and L Bands

High Performance Polarisation Independent RSOAs in the S,C and L Bands. S.Karagiannopoulos, A. E. Kelly , C. Michie, C. Tombling, W. I. Madden, I. Andonovic. Outline. Motivation Parametric performance System performance Comparison with C/L band device Extinction ratio

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High Performance Polarisation Independent RSOAs in the S,C and L Bands

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  1. High Performance Polarisation Independent RSOAs in the S,C and L Bands S.Karagiannopoulos, A. E. Kelly, C.Michie, C. Tombling, W. I. Madden, I. Andonovic

  2. Outline • Motivation • Parametric performance • System performance • Comparison with C/L band device • Extinction ratio • Temperature performance • Conclusions

  3. WDM-PON system Local Exchange Home/business 20km ONU AWG OLT Rx l1 l1+l33 Tx l1 l1 to 64 R-SOA@l33 x32 Tx l32 Rx l33 Rx l64 Tx l33 Tx l64

  4. RSOA wavelengths… • Can do upstream and downstream using a single wavelength via data stripping and remodulation. • System compromises required • Very high spec RSOA • Can use different bands for upstream and downstream and cyclic nature of AWG’s. • Need filtering at ONT • Increase number of users for given wavelength spacing

  5. Design • InP:InGaAsP • Buried Heterostructure • Lateral Waveguide Tapers • Tensile Bulk • 0.88 and AR coatings

  6. TO-packaged S-band RSOA parametric tests • Standard tests at 25ºC and 80mA

  7. RSOA modulation experiments • TO packaged devices on ETS evaluation board • 50mA DC bias, 60mA modulation • S band RSOA, CW injection at 1465 – 1530nm • Stage temperature 25°C • Modulation at 1.25 Gbps data rate with 2^11-1 PRBS bit pattern. • The RX consists of an APD photoreceiver and a 10GHz limiting amplifier

  8. Sensitivity, Output Power, Gain and Path Loss Capability at 1490nm and 25ºC • ~30dB return path loss capability at -20dBm input

  9. Sensitivity, Output Power, Gain and Path Loss Capability at 1580nm and 25ºC

  10. Sensitivity, Output Power, Gain and PLC versus Wavelength at 25ºC • -20dBm CW input power and 25ºC stage temperature • Eye diagram at 1490nm

  11. S, C and L band performance S-band device C-band device

  12. Extinction ratio versus wavelength

  13. Gain versus Current for the S-Band RSOA • Measured with lensed fibre(~2dB coupling efficiency) • Band filling effects explain in part the wavelength dependence of the extinction ratio

  14. Extinction ratio analysis

  15. Temperature performance:25C vs 50C

  16. Return path loss capability versus temperature

  17. Summary • TO packaged polarisation insensitive S,C& L band RSOA • ~1dB penalty at 1.25Gbit/s compared to commercial M-Z modulator • >25dB upstream PLC over 60nm at -20dBm input • In tandem with C/L band device allows operation over a 120nm bandwidth • Temperature performance shows operation up to ~70C • Higher performance required…. A E Kelly, C Michie, Wende Zhong, S Karagianopoulos, W I Madden, C Tombling, I Andonovic, ‘High Performance Polarisation Independent Reflective Semiconductor Optical Amplifiers in the S, C and L bands’, IEEE Journal on Selected Areas in Communications, vol. 28, no. 6, August 2010

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