Wide-bandwidth mode-hop-free tuning of extended-cavity GaN diode lasers

Hult, Johan; Burns, Iain S.; Kaminski, Clemens F.

doi:10.1364/ao.44.003675

Cited by 66 publications

(26 citation statements)

References 30 publications

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“…As an alternative approach, optical feedback can be realized by using the laser diode as an active laser medium in an external cavity configuration. Until now, this has been reported for GaN diode lasers [4][5][6][7][8][9] with output powers up to 80 mW [9].…”

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confidence: 99%

400 mW external cavity diode laser with narrowband emission at 445 nm

et al. 2014

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A high-power external cavity diode laser (ECDL) system with narrowband emission is presented. The system is based on a commercially available high-power GaN laser diode. For the ECDL, a maximum optical output power of 400 mW in continuous-wave operation with narrowband emission is achieved. Longitudinal mode selection is realized by using a surface diffraction grating in Littrow configuration. A spectral width of 20 pm at 445 nm with a side-mode suppression ratio larger than 40 dB is achieved. This concept enables diode laser systems suitable for subsequent nonlinear frequency conversion into the UV spectral range.

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confidence: 99%

400 mW external cavity diode laser with narrowband emission at 445 nm

et al. 2014

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“…Antireflection (AR) coating of the laser diode's output facet [5] and simultaneous adjustment of the diode current and grating in an appropriate ratio, which is called feed forward technique, can broaden continuous tuning range with mode-hop-free [6], [7]. Improving the stability of temperature controller can minimize the impact due to environment changing.…”

Section: Introductionmentioning

confidence: 99%

External cavity diode laser with long-term frequency stabilization based on mode boundary detection

Huang

2015

2015 Joint Conference of the IEEE International Frequency Control Symposium &Amp; The European Frequency and Time Forum

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We have implemented a long-term frequency stabilization system for external cavity diode laser (ECDL) based on mode boundary detection method. In this system, the saturated absorption spectroscopy was used. The current and the grating of the ECDL were controlled by a computer-based feedback control system. By checking any mode boundaries in the spectrum, the control system determined how to adjust current to avoid mode hopping. This procedure was executed periodically to ensure the long-term stabilization of ECDL in the absence of mode hops. This laser diode system without antireflection-coating had over operated in the condition of longterm mode hopping free stabilization for almost 400 hours. Last year, we have added template matching technics to the system. The ECDL stabilization time has been extended to almost 1200 hours without any manual intervention further. This is a significant improvement of ECDL frequency stabilization system. This technique is very useful in some applications such as laser atomic cooling and atom fountain etc.

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“…Supercontinuum sources offer significant advantages in optical sensing over conventional, narrow linewidth sources, such as diode lasers [19,20], in enabling measurements at a very high measurement speed or multiplexed measurements [21][22][23][24]. Only a few demonstrations have been reported so far on the use of broadband light sources such as stabilised frequency combs or supercontinuum light in CEAS or CRDS.…”

Section: Introductionmentioning

confidence: 99%