A hybrid integrated external cavity laser locked to an on-chip 10-meter coil resonator achieves 3 to 7 Hz fundamental and 27 to 60 Hz integral linewidths over wide tuning ranges without an optical isolator.
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Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser
A hybrid integrated external cavity laser locked to an on-chip 10-meter coil resonator achieves 3 to 7 Hz fundamental and 27 to 60 Hz integral linewidths over wide tuning ranges without an optical isolator.