Wavelength control for fibre-grating lasers enables low-cost DWDM operation down to 25 GHz channel spacing

We present a new, very cost-efficient control scheme to stabilise the mode and the emitted wavelength of fibre-grating lasers. It permits us to maintain the wavelength constant within /spl plusmn/5 pm while the output power may vary between -4 and +4 dBm. Such wavelength stability is a key requireme...

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Bibliographic Details
Main Authors: Schmale, I., Smolorz, S., Ronneberg, E., Drogemuller, K., Hubner, B.
Format: Conference Proceeding
Language:English
Subjects:
Applied sciences
Channel spacing
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fiber lasers
Information, signal and communications theory
Integrated optics. Optical fibers and wave guides
Laser modes
Laser stability
Monitoring
Multiplexing
Optical and optoelectronic circuits
Optical control
Optoelectronic devices
Photodiodes
Power generation
Power lasers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal and communications theory
Telecommunications and information theory
Wavelength division multiplexing
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Description
Summary:We present a new, very cost-efficient control scheme to stabilise the mode and the emitted wavelength of fibre-grating lasers. It permits us to maintain the wavelength constant within /spl plusmn/5 pm while the output power may vary between -4 and +4 dBm. Such wavelength stability is a key requirement for dense wavelength-division multiplex (DWDM) systems, and we demonstrate its suitability down to 25 GHz channel spacings. The control scheme is based solely on the power at the laser's back facet, which is monitored with a photodiode. Therefore, this control scheme drastically reduces the complexity and cost of DWDM laser sources.
ISSN:0569-5503
2377-5726
DOI:10.1109/ECTC.2002.1008068