Abstract
Improvements in the power level of sources near 1550 nm and in the efficiency of waveguide frequency doublers enabled us to lock a frequency-doubled source directly to the 5S1/2 → 5D5/2 two-photon transitions near 778 nm. We obtained a sufficiently powerful second-harmonic signal, exceeding 2 mW, by doubling an external-cavity diode laser that was amplified by an erbium-doped fiber amplifier in a periodically poled LiNbO3 channel waveguide. Our experimental scheme can be used for realizing compact, high-performance frequency standards near 1550 nm for fiber-optic communication and sensing applications.
Original language | English |
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Pages (from-to) | 905-907 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 25 |
Issue number | 12 |
DOIs | |
State | Published - 15 Jun 2000 |
Externally published | Yes |