Undergraduate Honors Thesis


Shelving Spectroscopy and Atomic Clock Development of the Strontium 689 nm Intercombination Line Public Deposited

Downloadable Content

Download PDF
  • Precise timekeeping is crucial for a myriad of applications, including GPS, telecommunications, financial transaction time-stamping, and more [20]. The burgeoning demand for increasingly accurate clocks at a smaller scale has driven significant progress in atomic clock miniaturization over the past two decades [8][10]. Chip-scale atomic clocks have emerged by employing micro-fabricated vapor cells containing atomic species conducive to high-precision timekeeping [20][12]. Strontium has emerged as an exceptional candidate for atomic clocks, with the development of clocks exhibiting deviations of less than 1 second in 300 billion years [5]. However, a chip-scale strontium clock remains to be realized. This paper delineates the advancements made toward the development of a strontium atomic clock utilizing a micro-fabricated vapor cell. The proposed design involves implementing a shelving spectroscopy scheme that employs the 1S0- 3P1 transition as the clock transition. Further refinement of the shelving scheme and the associated laser lock systems is necessary prior to the establishment of a functional clock. All components of this proposed design, encompassing both optical and electrical elements, can be miniaturized to chip scale, rendering it a promising solution for a wide range of applications with stringent weight and volume constraints. The strontium clock design outlined in this paper incorporates frequency and phase lock systems, which are critical for achieving precise resonance between the shelving and intermediate lasers with their respective transitions. This paper discusses the current limitations of these locking systems and proposes potential improvements. Once the frequency and phase locks are optimized and an additional frequency lock is employed, a clock is created by pairing a frequency counter with the laser resonant with the clock transition.

Date Awarded
  • 2023-04-05
Additional Information
  • Work completed at the National Institute of Standards and Technology
Academic Affiliation
Committee Member
Granting Institution
Last Modified
  • 2023-04-24
  • Boulder
Resource Type
Rights Statement
  • @masterthesis{Porter2023, title = {Shelving Spectroscopy and Atomic Clock Development of the Strontium 689 nm Intercombination Line}, author = {Samuel Porter}, year = 2023, month = {April}, school = {University of Colorado Boulder}, type = {Bachelor's Thesis} }


In Collection: