Abstract
We report an optical single-frequency synthesizer at the 1.55 μm telecommunications band. Output from a continuous-wave external cavity diode laser is frequency doubled and phase locked to a predetermined component of a Ti:S laser frequency comb. The synthesizer is capable of generating a single user-specified frequency from an atomic time base within the 192-196 THz gain bandwidth of an erbium-doped fiber amplifier. By tuning the repetition rate of the femtosecond laser the synthesized optical frequency can be swept with sub-kilohertz step size. Frequency sweeps of several GHz are realized by automatically re-locking the diode laser to adjacent comb components during frequency sweep. We demonstrate the operation of the device by presenting results of Doppler-free spectroscopy on acetylene using synthesized frequencies.
| Original language | English |
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| Pages (from-to) | 4890-4896 |
| Number of pages | 7 |
| Journal | Optics Express |
| Volume | 17 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 16 Mar 2009 |
| MoE publication type | A1 Journal article-refereed |