Narrow-band β-BaB_2O_4 optical parametric oscillator in a grazing-incidence configuration

In this paper, we investigate a thermal coherent state defined with the Lie-Trotter product formula under the formalism of the thermo field dynamics. In the definition of our thermal coherent state, we treat the thermalizing operator and the displacement operator symmetrically. We examine its uncertainty relation and quasiprobability distributions. Although this thermal coherent state is equivalent to the conventional ones except for different parameterizations and a phase factor, it is convenient for describing an experimental setup of the optical parametric oscillator laser.Comment: v1: 28 pages, 10 eps figures, latex2e; v2: 19 pages, 6 eps figures, a shortened version; v3: minor correction

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“…Now, because of the invariance under the tilde conjugation for |φ given by Eqs. (23), (24) and (25), we obtain µ * = ν, that is to say,…”

Section: Definitions Of Thermal Coherent Statesmentioning

confidence: 75%

“…The OPO-based laser system is constructed out of the OPO with ring resonators as shown in Figs. 5 and 6 [22,23,24,25]. In Fig.…”

Section: Definitions Of Thermal Coherent Statesmentioning

confidence: 99%

A thermal coherent state defined with the Lie-Trotter product formula

Azuma

Ban

2015

Journal of Modern Optics

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“…4 This configuration has also been used to minimize the bandwidth of an OPO based on b-BaB 2 O 4 (BBO), as we reported recently. 5 However, the external eff iciency of such a cavity was low, and we found stable SLM operation diff icult to achieve.…”

mentioning

confidence: 78%

Highly efficient single-longitudinal-mode β-BaB_2O_4 optical parametric oscillator with a new cavity design

Boon-Engering¹,

Gloster

Veer³

et al. 1995

Opt. Lett.

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A new coupled-cavity design for single-longitudinal-mode operation of an optical parametric oscillator (OPO) is presented. The OPO is based on a b-BaB 2 O 4 crystal and is pumped by the third harmonic of a Nd : YAG laser. With this design, we achieved single-longitudinal-mode operation of the OPO with a decrease in the threshold and an increase in external eff iciency compared with those of a conventional grazing-incidence OPO. A mathematical model that describes the mode spacings for this cavity is given. © 1995 Optical Society of America Optical parametric oscillators (OPO's) are attractive solid-state sources of coherent radiation with extensive tuning ranges and high efficiencies. However, free-running OPO's exhibit a broad spectral bandwidth that is not desirable for many applications. Several mechanisms have been explored to produce a narrow linewidth: injection seeding with a narrowband laser 2 and the use of frequency-selective intracavity elements such asétalons. 3Another technique to reduce the spectral bandwidth is to use a cavity in a grazing-incidence conf iguration. 4 For an OPO based on KTP in this conf iguration, single-longitudinal-mode (SLM) operation has been achieved. 4 This configuration has also been used to minimize the bandwidth of an OPO based on b-BaB 2 O 4 (BBO), as we reported recently. 5However, the external eff iciency of such a cavity was low, and we found stable SLM operation diff icult to achieve.In this Letter we present an OPO with a new cavity design based on the grazing-incidence conf iguration. The new design includes an additional mirror that couples back a small part of the zero-order output of the cavity. We have observed reliable SLM operation of this OPO at signif icantly higher external eff iciencies. It involves two coupled cavities: a grazing-incidence cavity and a cavity formed by the back mirror and a zero-order mirror placed in the zero-order beam ref lected from the grating. This second cavity is referred to as the linear cavity in the text. This composite resonator can be described as a Michelson-mirror cavity 6 with the conventional beam splitter replaced by a grating. Michelson-mirror cavities have been used to reduce the bandwidth of lasers, as reviewed by Smith.7 Using a mathematical model based on the description by Smith, 8 we are able to calculate the mode spacing of the coupled cavity accurately. Pinard and Young investigated a Fox -Smith-type coupled cavity for an OPO. 9 This coupled cavity, in which the gain medium is active in only one of the two cavities, differs from that in the Michelson case, in which the gain medium is active in both cavities.

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“…Gloster et al [19] reported walk-off compensated BBO OPO pumped by third harmonic of Nd:YAG laser radiation having 30 GHz linewidth at grazing angle of incidence configuration. They observed decrease in linewidth of the generated radiation with increasing grating angle.…”

Section: Grazing Angle Of Incidence Configurationmentioning

confidence: 99%

Narrow linewidth pulsed optical parametric oscillator

Das

2010

Pramana - J Phys

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Tunable narrow linewidth radiation by optical parametric oscillation has many applications, particularly in spectroscopic investigation. In this paper, different techniques such as injection seeding, use of spectral selecting element like grating, grating and etalon in combination, grazing angle of incidence, entangled cavity configuration and type-II phase matching have been discussed for generating tunable narrow linewidth radiation by singly resonant optical parametric oscillation process.

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Narrow-band β-BaB_2O_4 optical parametric oscillator in a grazing-incidence configuration

Cited by 31 publications

References 10 publications

A thermal coherent state defined with the Lie-Trotter product formula

A thermal coherent state defined with the Lie-Trotter product formula

Highly efficient single-longitudinal-mode β-BaB_2O_4 optical parametric oscillator with a new cavity design

Narrow linewidth pulsed optical parametric oscillator

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