External cavity wavelength tunable semiconductor lasers - a review

Mroziewicz, B.

doi:10.2478/s11772-008-0045-9

Cited by 81 publications

(40 citation statements)

References 88 publications

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“…4 shows the diffraction grating used in Littrow configuration to form an extended cavity with the rear facet of the diode. Many other variants of external cavities can be found in the literature (e.g., Mroziewicz 2008). The extended cavity effectively reduces the phase noise, and the wavelength-selective feedback from the grating narrows the laser linewidth further to a few 100 kHz.…”

Section: Passive Frequency Stabilizationmentioning

confidence: 99%

A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

Reiners¹,

Banyal²,

Ulbrich

2014

A&A

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State-of-the-art Doppler experiments require wavelength calibration with precision at the cm s −1 level. A low-finesse Fabry-Pérot interferometer (FPI) can provide a wavelength comb with a very large bandwidth as required for astronomical experiments, but unavoidable spectral drifts are difficult to control. Instead of actively controlling the FPI cavity, we propose to passively stabilize the interferometer and track the time-dependent cavity length drift externally using the 87 Rb D 2 atomic line. A dual-finesse cavity allows drift tracking during observation. In the low-finesse spectral range, the cavity provides a comb transmission spectrum tailored to the astronomical spectrograph. The drift of the cavity length is monitored in the high-finesse range relative to an external standard: a single narrow transmission peak is locked to an external cavity diode laser and compared to an atomic frequency from a Doppler-free transition. Following standard locking schemes, tracking at sub-mm s −1 precision can be achieved. This is several orders of magnitude better than currently planned high-precision Doppler experiments, and it allows freedom for relaxed designs including the use of a single-finesse interferometer under certain conditions. All components for the proposed setup are readily available, rendering this approach particularly interesting for upcoming Doppler experiments. We also show that the large number of interference modes used in an astronomical FPI allows us to unambiguously identify the interference mode of each FPI transmission peak defining its absolute wavelength solution. The accuracy reached in each resonance with the laser concept is then defined by the cavity length that is determined from the one locked peak and by the group velocity dispersion. The latter can vary by several 100 m s −1 over the relevant frequency range and severely limits the accuracy of individual peak locations, although their interference modes are known. A potential way to determine the absolute peak positions is to externally measure the frequency of each individual peak with a laser frequency comb (LFC). Thus, the concept of laser-locked FPIs may be useful for applying the absolute accuracy of an LFC to astronomical spectrographs without the need for an LFC at the observatory.

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Section: Passive Frequency Stabilizationmentioning

confidence: 99%

A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

Reiners¹,

Banyal²,

Ulbrich

2014

A&A

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“…With the progress in diode laser technology, inexpensive tunable single mode diode lasers with external cavity which are also called as external cavity diode lasers (ECDLs) [54][55][56][57][58] have recently been applied for the measurements of velocity distributions of In [59], He [60], Ar discharge is also shown in Fig. 21 for comparison.…”

Section: Measurement Of Gas Temperature Using An Extra Cavity Diode Lmentioning

confidence: 99%

Deposition of Aluminum-Doped ZnO Films by ICP-Assisted Sputtering

Matsuda

Hirashima

Mine

et al. 2013

ZnO Nanocrystals and Allied Materials

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Inductively coupled plasma (ICP) assisted DC sputter-deposition was used for the deposition of Al-doped ZnO (AZO or ZnO:Al) thin films. With increasing ICP RF power, film properties including deposition rate, crystallinity, transparency and resistivity were improved. To understand the plasma-surface interaction, several plasma diagnostics were performed. Heat fluxes to the substrate were measured by thermal probes, number densities of sputtered metallic atom species were measured by absorption spectroscopy using hollow cathode lamps (HCL) and light emitting diodes (LEDs), and neutral gas temperatures were measured by external cavity diode laser (ECDL) absorption spectroscopy. As a result, it was revealed that the high density ICP heated the substrate through a high heat flux to the substrate, resulting in a high quality film deposition without the need for intentional substrate heating.The heat flux to the substrate was predominantly contributed by the plasma charged species, not by the neutral Ar atoms which were also significantly heated in the ICP. The substrate position where the highest quality films were obtained was found to coincide with the position where the substrate heat flux took the maximum value.

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“…A review of state of the art developments concerning configurations and properties of various ECLs can be found in Ref. 10. Here, we report on the results obtained in the ECL system that has been built using two diffraction gratings one of which was reflection and the other one of transmission type.…”

Section: Introductionmentioning

confidence: 96%

Double-frequency external cavity laser with a singular optical semiconductor amplifier

Kowalczyk

Szyjer

Fronc

et al. 2009

Opto-Electronics Review

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Optical properties of an external cavity laser with a semiconductor optical amplifier and two diffraction gratings are described. The laser has been pigtailed and its emission showed two peaks in the output spectrum. The wavelength of the peaks, and in particular the spectral spacing between them, could be controlled by adjusting the reflecting elements in the system. The proposed double-frequency laser may be adopted as a signal source in terahertz generators.

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External cavity wavelength tunable semiconductor lasers - a review

Cited by 81 publications

References 88 publications

A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

Deposition of Aluminum-Doped ZnO Films by ICP-Assisted Sputtering

Double-frequency external cavity laser with a singular optical semiconductor amplifier

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External cavity wavelength tunable semiconductor lasers - a review

Cited by 81 publications

References 88 publications

A laser-lock concept to reach cm s-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

A laser-lock concept to reach cm s-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

Deposition of Aluminum-Doped ZnO Films by ICP-Assisted Sputtering

Double-frequency external cavity laser with a singular optical semiconductor amplifier

Contact Info

Product

Resources

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A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators

A laser-lock concept to reach cm s^-1-precision in Doppler experiments with Fabry-Pérot wavelength calibrators