Blue‐green light generation using high brilliance edge emitting diode lasers

Jechow, Andreas; Menzel, Ralf; Paschke, K.; Erbert, G.

doi:10.1002/lpor.200900023

Cited by 34 publications

(19 citation statements)

References 158 publications

(169 reference statements)

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“…One of these nonlinear processes is the second harmonic generation (SHG) [11], [12]. This process offers an efficient method for generation of coherent light in the blue-green spectral range, where efficient, direct, and diffraction limited emission from semiconductor materials does not exist in the watt-range [13]. Such frequency converted laser systems have been used as pump sources for titanium sapphire (Ti:S) lasers and examples of their use within biophotonics imaging, in the field of retinal optical coherence tomography (OCT) and in multi photon tomography (MPT) has been reported [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

Intensity Noise Transfer Through a Diode-Pumped Titanium Sapphire Laser System

Tawfieq

Hansen

Jensen

et al. 2018

IEEE J. Quantum Electron.

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Abstract-In this paper, we investigate the noise performance and transfer in a titanium sapphire (Ti:S) laser system. This system consists of a DBR tapered diode laser, which is frequency doubled in two cascaded nonlinear crystals and used to pump the Ti:S laser oscillator. This investigation includes electrical noise characterizations of the utilized power supplies, the optical noise of the fundamental light, the second harmonic light, and finally the optical noise of the femtosecond pulses emitted by the Ti:S laser. Noise features originating from the electric power supply are evident throughout the whole transfer chain. It is demonstrated that improving the electrical noise provides an easy method for reducing the relative intensity noise (RIN) in all stages. The frequency doubled light is shown to have a higher RIN than the fundamental light. In particular, the cascaded system is seen to exhibit higher RIN than a setup with only a single nonlinear crystal. The Ti:S is shown to have a cut-off frequency around 500 kHz, which means that noise structures of the pump laser above this frequency are strongly suppressed. Finally, the majority of the Ti:S noise seems to originate from the laser itself, which partly can be explained by the effect of relaxation oscillation frequency.

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Section: Introductionmentioning

confidence: 99%

Intensity Noise Transfer Through a Diode-Pumped Titanium Sapphire Laser System

Tawfieq

Hansen

Jensen

et al. 2018

IEEE J. Quantum Electron.

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“…Furthermore, the use of integrated Bragg gratings in such diode lasers enables narrow spectrum emission. Nonlinear frequency conversion of tapered diode lasers is an efficient method for generation of coherent light in the required blue-green spectral range 7,8 . SHG of tapered diode lasers has been demonstrated at many different wavelengths and power levels [9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

High-power non linear frequency converted laser diodes

Jensen

Andersen

Hansen³

et al. 2015

Quantum Sensing and Nanophotonic Devices XII

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We present different methods of generating light in the blue-green spectral range by nonlinear frequency conversion of tapered diode lasers achieving state-of-the-art power levels. In the blue spectral range, we show results using single-pass second harmonic generation (SHG) as well as cavity enhanced sum frequency generation (SFG) with watt-level output powers. SHG and SFG are also demonstrated in the green spectral range as a viable method to generate up to 4 W output power with high efficiency using different configurations.

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“…However, their physical dimensions, low efficiency and high cost limit widespread adoption of applications. Nonlinear frequency conversion of diode lasers is an attractive method to circumvent some of the limitations of solid state lasers as outlined in the review article by Jechow et al [18]. Diode lasers are compact and efficient and in high volumes they can be produced at very low cost.…”

Section: Introductionmentioning

confidence: 99%