A deep-UV optical frequency comb at 205 nm (2009)
Peters, Elisabeth, Diddams, Scott A., Fendel, Peter, Reinhardt, Sascha, Hänsch, Theodor Werner, Udem, Thomas
The absolute frequency of the 87Sr optical clock transition (2008)
Campbell, Gretchen K., Ludlow, Andrew D., Blatt, Sebastian, Thomsen, Jan W., Martin, Michael J., ...
The absolute frequency of the 1S0-3P0 clock transition of 87Sr has been measured to be 429 228 004 229 873.65 (37) Hz using lattice-confined atoms, where the fractional uncertainty of 8.6x10-16...
Gebs, Raphael, Dekorsy, Thomas, Diddams, Scott A., Bartels, Albrecht
We report an optical parametric oscillator (OPO) based on periodically poled lithium niobate (PPLN) that is synchronously pumped by a femtosecond Ti:sapphire laser at 1 GHz repetition rate. The...
Passively mode-locked 10 GHz femtosecond Ti:sapphire laser (2008)
Bartels, Albrecht, Heinecke, Dirk, Diddams, Scott A.
We report a mode-locked Ti:sapphire femtosecond laser emitting 42 fs pulses at a 10 GHz repetition rate. When operated with a spectrally integrated average power greater than 1 W, the associated...
Passively mode-locked 10 GHz femtosecond Ti:sapphire laser (2008)
Bartels, Albrecht, Heinecke, Dirk, Diddams, Scott A.
We report a mode-locked Ti:sapphire femtosecond laser emitting 42 fs pulses at a 10 GHz repetition rate. When operated with a spectrally integrated average power greater than 1 W, the associated...
Spectrally resolved optical frequency comb from a self-referenced 5 GHz femtosecond laser (2007)
Bartels, Albrecht, Gebs, Raphael, Kirchner, Matt, Diddams, Scott A.
We report a mode-locked Ti:sapphire femtosecond laser with 5GHz repetition rate. Spectral broadening of the 24 fs pulses in a microstructured fiber yields an octave-spanning spectrum and permits...
Coherent optical phase transfer over a 32-km fiber with 1-s instability at $10^{-17}$ (2007)
Foreman, Seth M., Ludlow, Andrew D., Stalnaker, Jason E., Diddams, Scott A., Ye, Jun
The phase coherence of an ultrastable optical frequency reference is fully maintained over actively stabilized fiber networks of lengths exceeding 30 km. For a 7-km link installed in an urban...
Spectrally resolved optical frequency comb from a self-referenced 5 GHz femtosecond laser (2007)
Bartels, Albrecht, Gebs, Raphael, Kirchner, Matthew S., Diddams, Scott A.
We report a mode-locked Ti:sapphire femtosecond laser with 5 GHz repetition rate. Spectral broadening of the 24 fs pulses in a microstructured fiber yields an octave-spanning spectrum and permits...
Wilpers, Guido, Oates, Chris, Diddams, Scott A., Bartels, Albrecht, Fortier, Tara, Oskay, Windell, ...
We report an absolute frequency measurement of the optical clock transition at 657 nm in 40Ca with a relative uncertainty of 7.5 x 10-15
Frequency Uncertainty for Optically Referenced Femtosecond Laser Frequency Combs (2007)
Ma, Long-Sheng, Bi, Zhiyi, Bartels, Albrecht, Kim, Kyoungsik, Robertsson, Lennart, Zucco, Massimo, ...
We present measurements and analysis of the currently known relative frequency uncertainty of femtosecond laser frequency combs (FLFCs) based onKerr-lens mode-locked Ti:sapphire lasers. Broadband...
Fortier, Tara M., Bartels, Albrecht, Diddams, Scott A.
We demonstrate a self-referenced, octave-spanning, mode-locked Ti:sapphire laser with a scalable repetition rate (550 MHz-1.35 GHz). We use the frequency comb output of the laser, without additional...
Phase-stabilized ultrafast lasers signal new era in measurement and research (2006)
Fortier, Tara M., Bartels, Albrecht, Diddams, Scott A.
The 2005 Nobel Prize in Physics highlights the combination of optical frequency combs and precision spectroscopy for tests of basic physics.
Bartels, Albrecht, Diddams, Scott A., Oates, Chris W., Wilpers, Guido, Bergquist, James C., Oskay, Windell H., ...
We use femtosecond laser frequency combs to convert optical frequency references to the microwave domain, where we demonstrate the synthesis of lO-GHz signals having a fractional frequency...
High-resolution spectroscopy with a femtosecond laser frequency comb (2005)
Gerginov, Vladislav, Tanner, Carol E., Diddams, Scott A., Bartels, Albrecht, Hollberg, Leo
The output of a mode-locked femtosecond laser is used for precision single-photon spectroscopy of 133Cs in an atomic beam. By changing the laser's repetition rate, the cesium D 1 (6s...
Bartels, Albrecht, Newbury, Nathan R., Thomann, Isabell, Hollberg, Leo, Diddams, Scott A.
We link the output spectra of a Ti.sapphire and a Cr .forst erite femtosecond laser phase coher ently to form a continuous frequ ency comb with a wavelength coverage of O.57-1.45 μm a t power...
Optical Frequency Synthesis and Comparison with Uncertainty at the 10 -19 Level (2004)
Ma, Long-Sheng, Bi, Zhiyi, Bartels, Albrecht, Robertsson, Lennart, Zucco, Massimo, Windeler, Robert S., ...
A femtosecond Laser-based opticaL frequency synthesizer is referenced to an optical standard, and we use it to demonstrate the generation and controL of the frequency of eLectromagnetic fieLds over...
Stabilization of femtosecond laser frequency combs with subhertz residual linewidths (2004)
Bartels, Albrecht, Oates, Chris W., Hollberg, Leo, Diddams, Scott A.
We demonstrate that femtosecond laser frequency combs (FLFCs) can have a subhertz linewidth across their entire emission spectra when they are phase locked to a reference laser with a similarly...
Corwin, Kristan L., Thomann, Isabell, Dennis, Tasshi, Fox, Richard W., Swann, William, Curtis, Anne, ...
A frequency comb is generated with a chromium-doped forsterite femtosecond laser, spectrally broadened in a dispersion-shifted highly nonlinear fiber, and stabilized. The resultant evenly spaced comb...
Gerginov, Vladislav, Tanner, Carol E., Diddams, Scott A., Bartels, Albrecht, Hollberg, Leo
Optical frequencies of the hyperfine components of the D2 line in 133Cs are determined using high-resolution spectroscopy and a ferntosecond laser frequency comb. A narrow-linewidth probe laser...
Bartels, Albrecht, Diddams, Scott A., Ramond, T. M., Hollberg, Leo
We independently phase lock the repetition rates of two femtosecond lasers at their =456,OOOth harmonic to a common optical oscillator. The timing jitter of each individual laser relative to the...
420-MHz Cr:forsterite femtosecond ring laser and continuum generation in the 1-2-my m range (2003)
Thomann, Isabell, Bartels, Albrecht, Corwin, Kristan L., Newbury, Nathan R., Hollberg, Leo, Diddams, Scott A., ...
We demonstrate a chromium-doped forsterite femtosecond ring laser that generates 30-fs pulses at a 420-MHz repetition rate with nearly 500 mW of average power. The compact solid-state design and...
Diddams, Scott A., Bartels, Albrecht, Ramond, Tanya M., Oates, Chris W., Bize, Sebastien, Curtis, E. Anne, ...
This paper describes recent advances in the design and control of femtosecond laser combs for their use in optical clocks and in the synthesis of low-noise microwave and optical signals. The authors...
Ramond, T. M., Diddams, Scott A., Hollberg, Leo, Bartels, Albrecht
An optical clockwork is created with a compact 1-GHz repetition-rate laser and three nonlinear crystals. The broadband continuum output of the laser covers sufficient bandwidth to provide direct...