The waveguide laser: A review

Degnan, John J.

doi:10.1007/bf00895012

Cited by 171 publications

(19 citation statements)

References 114 publications

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“…and 9' II as 2.6× 108 s-1 and 6.5 × 104 s-1, respectively, according to the empirical formula in [3,4] under the conditions of laser medium temperature T= 300 K and the parameters used in our experiment ioncluding the gas pressure and mixture gas ratio. The values estimated above are slightly different with that from our measurement.…”

Section: Comparision Of Resultsmentioning

confidence: 99%

Determination of dynamical parameters of a CO2 laser by fitting theoretical equation with experimental data

Zhang

Gao

Jin

et al. 1993

Z Phys D - Atoms, Molecules and Clusters

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Section: Comparision Of Resultsmentioning

confidence: 99%

Determination of dynamical parameters of a CO2 laser by fitting theoretical equation with experimental data

Zhang

Gao

Jin

et al. 1993

Z Phys D - Atoms, Molecules and Clusters

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“…As an intriguing aside, it was again around the beginning of the 70's that planar-waveguides found application with gaseous active media as well [22], where well-understood techniques such as electric or RF discharges could be used as an efficient excitation mechanism. Although based on hollow-waveguides and leaky modes as discussed by Degnan [23], optimization of the geometry led to reasonable propagation losses and ultimately efficient laser operation.…”

Section: A the Early Yearsmentioning

confidence: 99%

Dielectric Solid-State Planar Waveguide Lasers: A Review

Mackenzie

2007

IEEE J. Select. Topics Quantum Electron.

142

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This review takes a look at the historical development of the dielectric planar waveguide laser leading to key state-of-the-art technologies which fall within this broad subject area. Discussed herein are many of the advantages offered by the waveguide geometry such as; high optical-gain and thus low threshold-power requirements, suitability for quasi-three-level laser transitions, integration with functional devices on single substrates, guided spatial-mode control, and its considerable immunity to thermal effects and external environmental conditions. A detailed snapshot is made of many active host media for which there has been reported laser action in the planar waveguide geometry, covering many of the major rare-earth-ion transitions. Several fabrication techniques are highlighted and appraised for their applicability to different host media, touching on their benefits and drawbacks. Challenges and future prospects for these lasers are considered.

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“…The attenuation constants of these modes are proportional to : if is much smaller than the a, the mode overlap with the lossy Pyrex is reduced, and the propagation losses are low. In fact, the propagation losses in the HW are only 0.1 dB/m at 2.7 THz for a bore diameter of 4 mm according to the wave-optics based formula in 27 .…”

mentioning

confidence: 99%

Compact and sensitive heterodyne receiver at 2.7 THz exploiting a quasi-optical HEB-QCL coupling scheme

Joint

Gay

Vigneron

et al. 2019

Applied Physics Letters

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We demonstrate a sensitive and compact terahertz heterodyne detection system based on a quantum cascade laser (QCL) as a local oscillator and a hot electron bolometer (HEB) as a mixer. It relies on an original optical coupling scheme where the terahertz (THz) signal to be detected and the local oscillator (LO) signal are coupled to the HEB from both sides of the integrated lens/antenna mixer. The THz signal of interest impinges on the front side through the silicon lens while the LO onto the rear (air) side. This concept allows us to remove the beam splitter usually employed in terahertz heterodyne receivers. The mixer consists of a Niobium Nitride HEB with a log-spiral planar antenna mounted on the flat side of a hyperhemispherical silicon lens. The local oscillator of the heterodyne detector is a low power consumption and low beam divergence 3rd-order distributed feedback laser with single mode emission at the target frequency of 2.7 THz. The coupling between the QCL and the HEB has been further optimized, using a dielectric hollow waveguide that reliably increases the laser beam directivity and permits us to pump the HEB into its most sensitive state through the air side of the planar antenna. We have measured a noncorrected double sideband receiver noise temperature of 880 K at 2.7 THz.

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The waveguide laser: A review

Cited by 171 publications

References 114 publications

Determination of dynamical parameters of a CO2 laser by fitting theoretical equation with experimental data

Determination of dynamical parameters of a CO2 laser by fitting theoretical equation with experimental data

Dielectric Solid-State Planar Waveguide Lasers: A Review

Compact and sensitive heterodyne receiver at 2.7 THz exploiting a quasi-optical HEB-QCL coupling scheme

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