Laser heterodyne spectroscopy of 127 I 2 hyperfine structure near 532 nm

Two frequency-doubled diode-pumped Nd:YAG lasers are used to study the hyperfine spectrum of 127I2 near 532 nm by heterodyne spectroscopy. Eight rovibrational transitions between the lowest vibrational level in the ground (X) state to vibrational levels 32–36 in the B state are observed. The measured frequency splittings are used to determine the difference in the hyperfine constants for these transitions. The standard deviation of the theoretical fit to the measured spectra is better than 10 kHz. The root Allan variance of the beat frequency between the I2-locked lasers follows a 1.1×10−2/τ dependence for measurements times τ > 0.002 s and reaches a minimum value of 2.5 × 10−13 (two-sample beat frequency of 70 Hz) at τ = 32 s. A method for accurately determining the absolute frequency of the iodine lines near 532 nm is proposed.

[1]  Peter Esherick,et al.  Polarization feedback stabilization of an injection-seeded Nd:YAG laser for spectroscopic applications , 1987 .

[2]  John L. Hall,et al.  Servo control of amplitude modulation in frequency-modulation spectroscopy: demonstration of shot-noise-limited detection , 1985 .

[3]  M. Gläser.  Identification of hyperfine structure components of the iodine molecule at 640 nm wavelength , 1985 .

[4]  Copolarized and cross-polarized incoherent specific intensities for waves at oblique incidence upon layers of finitely conducting particles with rough surfaces , 1987 .

[5]  A. Raynal,et al.  Description of the absorption spectrum of iodine recorded by means of Fourier Transform Spectroscopy : the (B-X) system , 1985 .

[6]  A. Brillet,et al.  LASER FREQUENCY STABILIZATION BY SATURATED ABSORPTION , 1981 .

[7]  Kenneth M. Evenson,et al.  2.5‐THz frequency difference measurements in the visible using metal‐insulator‐metal diodes , 1983 .

[8]  Chuan Yi Tang,et al.  A 2.|E|-Bit Distributed Algorithm for the Directed Euler Trail Problem , 1993, Inf. Process. Lett..

[9]  R. F. Barrow,et al.  B 3 Π 0+u —X1∑+g system of 127I2: rotational analysis and long-range potential in the B3Π0+u state , 1973 .

[10]  M. Gläser.  An improved He-Ne laser at λ = 612 nm, stabilized by means of an external absorption cell , 1986 .

[11]  S. Gerstenkorn,et al.  Absolute iodine (I2) standards measured by means of Fourier transform spectroscopy , 1979 .

[12]  John S. Muenter,et al.  Laser fluorescence state selected and detected molecular beam magnetic resonance in I2 , 1980 .

[13]  C. Bordé,et al.  High precision saturation spectroscopy of 127I2 with argon lasers at 5 145 Å and 5 017 Å : I — Main resonances , 1981 .

[14]  J. Nibler,et al.  Use of seeded Nd:YAG lasers for high-resolution spectroscopy. , 1993, Optics letters.

[15]  D Meschede,et al.  Realization of a new concept for visible frequency division: phase locking of harmonic and sum frequencies. , 1990, Optics letters.

[16]  N C Wong.  Optical frequency counting from the UV to the near IR. , 1992, Optics letters.

[17]  M. Levenson,et al.  Hyperfine Interactions in Molecular Iodine , 1972 .

[18]  F. Spieweck,et al.  Hyperfine structure of the R(98), 58-1 line of 127I2 at 514.5 nm , 1979 .

[19]  J. J. Snyder,et al.  High-sensitivity nonlinear spectroscopy using a frequency-offset pump. , 1980, Optics letters.

[20]  R W Wallace,et al.  Efficient second-harmonic conversion of cw single-frequency Nd:YAG laser light by frequency locking to a monolithic ring frequency doubler. , 1991, Optics letters.

[21]  Clifford R. Pollock,et al.  Direct frequency measurement of the I(2)-stabilized He-Ne 473-THz (633-nm) laser. , 1983, Optics letters.

[22]  R L Byer,et al.  Absolute frequency stabilization of diode-laser-pumped Nd:YAG lasers to hyperfine transitions in molecular iodine. , 1992, Optics letters.