Multicolor lasers using birefringent filters: experimental demonstration with Cr:Nd:GSGG and Cr:LiSAF
TLDR
This study is the first detailed investigation and experimental demonstration of birefringent filters with tilted optical axis for multicolor operation of solid-state lasers and it is suggested that implementation of tilted-axis BRFs should boost development of efficient and low-costMulticolor lasers in other gain media as well.Abstract:
In this study, we numerically and experimentally investigate application of birefringent filters (BRFs) as frequency selective elements in multicolor lasers. A BRF plate made out of crystalline quartz with an arbitrarily oriented optical axis has been explored. Simulation results have shown that compared to regular BRFs where the optical axis lies in the plane of the plates surface, a BRF with an optical axis pointing out of its surface enables design flexibility in filter parameters, providing access to a wider set of free spectral range and bandwidth values. As a result, multicolor operation could be obtained in many wavelength pairs using a single BRF plate. In the experiments a 3-mm thick quartz BRF with an optical axis 45° to the surface plane has been used. With Cr:Nd:GSGG as a laser medium two-color and three-color cw laser operation has been demonstrated in 11 and 3 different transition combinations, respectively. Moreover, two-color laser operation has been demonstrated in 10 different wavelength pairs in Cr:LiSAF. To our knowledge, this study is the first detailed investigation and experimental demonstration of BRFs with tilted optical axis for multicolor operation of solid-state lasers. Compared to other methods, BRFs enable a rich selection of transition pairs and also the ratio of the power in each line could be regulated by fine adjustment of the rotation angle. Implementation of tilted-axis BRFs should boost development of efficient and low-cost multicolor lasers in other gain media as well.read more
Citations
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Journal ArticleDOI
Frequency-comb-based laser system producing stable optical beat pulses with picosecond durations suitable for high-precision multi-cycle terahertz-wave generation and rapid detection.
TL;DR: It is demonstrated that the inherent synchronization of the frequency comb's ultra-short pulse train and the synthesized optical beat pulses enables rapid and phase-sensitive sampling of such pulses.
Journal ArticleDOI
100-nm tunable femtosecond Cr:LiSAF laser mode locked with a broadband saturable Bragg reflector
Umit Demirbas,Jing Wang,Gale S. Petrich,Sheila Nabanja,Jonathan R. Birge,Leslie A. Kolodziejski,Franz X. Kärtner,James G. Fujimoto +7 more
Abstract: We report broad tunability of a femtosecond (fs) diode-pumped Cr:LiSAF laser mode-locked with a broadband saturable Bragg reflector (SBR). The SBR had seven pairs of AlxOy(n∼1.5) and Al0.17Ga0.83As(n∼3.5) layers in its Bragg stack, enabling a 250 nm reflectivity bandwidth around 850 nm. A 6-nm-thick strained In0.15Ga0.85As quantum well placed between Al0.17Ga0.83As cladding layers was used as a broadband saturable absorber in the 800–920 nm wavelength range. The laser was pumped by 6 single mode diodes—four at 640 nn and two at 660 nm. Mode locking was self-starting and fs pulses could be continuously tuned from 800 nm to 905 nm by an intracavity birefringent filter with an out-of-plane optic axis. The pulse widths varied from 70 fs to 255 fs as the laser was tuned. The laser had an 85.5 MHz repetition rate and the output power varied from 80 mW to 180 mW with tuning.
Journal ArticleDOI
Triple-Wavelength Lasing with a Stabilized β-LaBSiO5:Nd3+ Crystal.
Lingyun Li,Fazheng Huang,Yi Shi,Zhongzhong Luo,Guo-Qiang Wang,Xinxu Li,Bingxuan Li,Lizhen Zhang,Yi Yu,Ya-Nan Feng,Chengkai Yang,Yan Yu,Kenneth R. Poeppelmeier +12 more
TL;DR: The Nd3+-doped high-temperature phase of LaBSiO5 (β-LBSO) is an ideal crystal to produce triple-wavelength laser around 1060 nm as discussed by the authors .
Journal ArticleDOI
Self-Q-switched and multicolor operation of a Tm:LuAG laser.
TL;DR: Self-Q-switched (SQS) and three-color operation of an all-solid-state Tm:LuAG laser for the first time to the authors' knowledge and is believed to be the first cw-pumped stable SQS 2 µm laser that contains an ordered isotropic gain medium as well as the highest pulse energy obtained in any cw -pumped SQS laser.
Proceedings ArticleDOI
Dual-wavelength Yb:CALGO laser with wavelength spacing tunability
TL;DR: In this article, a dual-wavelength Yb:CALGO laser was demonstrated using a 12mm thick off-surface axis birefringent filter, and the obtained wavelength spacing could be tuned from a few nm up to tens of nm.
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