Frequency comb stabilization with bandwidth beyond the limit of gain lifetime by an intracavity graphene electro-optic modulator.

Intracavity loss modulation enables offset-frequency control with bandwidths beyond what is possible by pump power modulation. To demonstrate this new method, we use a subwavelength thick graphene electro-optic modulator to stabilize the offset frequency in a Tm:fiber frequency comb at 1.95 μm wavelength. Record-low residual phase noise of 144 mrads was achieved with this new locking scheme.

[1]  Hall,et al.  Carrier-envelope phase control of femtosecond mode-locked lasers and direct optical frequency synthesis , 2000, Science.

[2]  Sakae Kawato,et al.  A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator. , 2010, Optics express.

[3]  H. Haus.  Parameter ranges for CW passive mode locking , 1976 .

[4]  Jun Ye,et al.  Mode-locked fiber laser frequency-controlled with an intracavity electro-optic modulator. , 2005, Optics letters.

[5]  Günter Steinmeyer,et al.  Direct frequency comb synthesis with arbitrary offset and shot-noise-limited phase noise , 2010 .

[6]  Xiang Zhang,et al.  A graphene-based broadband optical modulator , 2011, Nature.

[7]  Scott A. Diddams,et al.  The evolving optical frequency comb [Invited] , 2010 .

[8]  J. Diels,et al.  Stabilization of femtosecond lasers for optical frequency metrology and direct optical to radio frequency synthesis. , 2001, Physical review letters.

[9]  William C Swann,et al.  High-performance, vibration-immune, fiber-laser frequency comb. , 2009, Optics letters.

[10]  Feng Wang,et al.  Gate-Variable Optical Transitions in Graphene , 2008, Science.

[11]  Nathan R. Newbury,et al.  Searching for applications with a fine-tooth comb , 2011 .

[12]  Hall,et al.  Direct link between microwave and optical frequencies with a 300 THz femtosecond laser comb , 2000, Physical review letters.

[13]  S. Suzuki,et al.  Broadband graphene electro-optic modulators with sub-wavelength thickness. , 2012, Optics express.