Dual-frequency distributed feedback fibre laser for microwave signals generation

Dual-frequency distributed feedback fibre laser for microwave signals generation

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Presented is a new dual-frequency laser based on an erbium-doped distributed feedback fibre laser operating on two orthogonally polarised eigenstates around 1.55 µm, exhibiting a frequency offset in the microwave domain. The beatnote in the free running regime between these two optical waves allows the generation of an RF signal around 1 GHz with a RIN lower than −115 dB/Hz over the frequency range 50 kHz to 10 MHz and a phase noise of −67 dBc/Hz at 10 kHz of the RF carrier. Up to 600 MHz tunability of the beatnote is obtained by mechanical stress applied to the cavity.


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      • Morvan, L., Dofli, D., Huignard, J.-P., Blanc, S., Vallet, M., Bretenaker, F., Le Floch, A.: `Dual-frequency laser at 1.53 µm for generating high-purity optically carried microwave signals up to 20 GHz', CLEO, 2004, San Francisco, CA, USA.
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