High-Power, Low RIN 1.55- \mu Directly Modulated DFB Lasers for Analog Signal Transmission

High-Power, Low RIN 1.55- \mu Directly Modulated DFB Lasers for Analog Signal Transmission

We report the demonstration of high-power and low relative intensity noise (RIN) directly modulated distributed feedback lasers at 1.55 μm. We have developed a structure with asymmetrical cladding to reduce internal losses due to the p-doped upper cladding. We obtain an output power of 140 mW at 550...

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Veröffentlicht in:IEEE photonics technology letters 2012-01, Vol.24 (2), p.116-118
Hauptverfasser: Faugeron, M., Tran, M., Lelarge, F., Chtioui, M., Robert, Y., Vinet, E., Enard, A., Jacquet, J., Van Dijk, F.
Format: Artikel
Sprache:eng
Schlagworte:
15- mu{\rm m} lasers
directly modulated lasers
Distributed feedback devices
distributed feedback lasers
high-power diode lasers
low noise lasers
Masers
Modulation
Optical fibers
Power lasers
Semiconductor lasers
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Zusammenfassung:We report the demonstration of high-power and low relative intensity noise (RIN) directly modulated distributed feedback lasers at 1.55 μm. We have developed a structure with asymmetrical cladding to reduce internal losses due to the p-doped upper cladding. We obtain an output power of 140 mW at 550 mA and an RIN below -157 dB/Hz in the 0.1-20 GHz range along with a high side-mode suppression ratio (>;55 dB). The modulation bandwidth was larger than 7 GHz. The characteristics of these lasers, namely a high electrical to optical conversion efficiency (0.340 W/A at 350 mA), low noise, high power (98 mW at 350 mA), and linearity, make them the perfect candidates for high gain, high dynamic directly modulated analog links.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2173479