Cr-doped materials as potential broadband and tunable sources

Jau-Sheng Wang; Vincent Huang; Yen-Sheng Lin; Wood-Hi Cheng

doi:10.1117/12.827661

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28 April 2009 Cr-doped materials as potential broadband and tunable sources

Jau-Sheng Wang; Vincent Huang; Yen-Sheng Lin; Wood-Hi Cheng

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Proceedings Volume 7339, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications V; 73390R (2009) https://doi.org/10.1117/12.827661
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

Various oxidation states and location sites of chromium (Cr) in doped crystal have been known. Since the high sensitivity of ligand field on chromium ions, these are attributable to a broadband emission. The wide broadband emission can potentially be exploited in many ways. For instance, a Cr-doped broadband amplified spontaneous emission can improve spatial resolution many times in optical coherence tomography (OCT) diagnostic instrumentation. It is difficult to further extend the emission bandwidth of Cr in a single crystal, although a single crystal is generally considered as the best host. Amorphous as a host, on the other hand, may potentially expand the bandwidth of emission and accommodate higher doping concentration. However, a single crystal is beneficial to a specific valance state through charge compensation technique. To investigate chromium's full potential, both Cr-doped nano-crystalline embedded in an amorphous host and Cr-doped glasses are proposed. The ultimate aims are capable of tailoring oxidation states, site symmetry and concentrations of Cr doping. In the first stage, Cr:YAG-doped silica fiber will be studied as a part of our research scope.

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Jau-Sheng Wang, Vincent Huang, Yen-Sheng Lin, and Wood-Hi Cheng "Cr-doped materials as potential broadband and tunable sources", Proc. SPIE 7339, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications V, 73390R (28 April 2009); https://doi.org/10.1117/12.827661

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