Université de Neuchâtel

A miniature frequency-stabilized VCSEL system emitting at 795 nm based on LTCC modules

Gruet, Florian ; Vecchio, Fabrizio ; Affolderbach, Christoph ; Pétremand, Yves ; de Rooij, Nicolaas F ; Maeder, Thomas ; Mileti, Gaetano

In: Optics and Lasers in Engineering, 2013, vol. 51, no. 8, p. 1023–1027

We present a compact frequency-stabilized laser system locked to the Rubidium absorption line of a micro-fabricated reference cell. A printed circuit board (PCB) is used to carry all the components and part of the electronics, and low-temperature co-fired ceramic (LTCC) modules are used to temperature-stabilize the laser diode and the miniature Rubidium cell (cell inner dimensions: 5 mm diameter...

Université de Neuchâtel

Low-temperature indium-bonded alkali vapor cell for chip-scale atomic clocks

Straessle, Rahel ; Pellaton, Matthieu Lucien ; Affolderbach, Christoph ; Pétremand, Yves ; Briand, Danick ; Mileti, Gaetano ; de Rooij, Nicolaas F

In: Journal of Applied Physics, 2013/113/6/064501/1-8

A low-temperature sealing technique for micro-fabricated alkali vapor cells for chip-scale atomic clock applications is developed and evaluated. A thin-film indium bonding technique was used for sealing the cells at temperatures of ≤140 °C. These sealing temperatures are much lower than those reported for other approaches, and make the technique highly interesting for future micro-fabricated...