Efficient frequency doubling of a pulsed laser diode by use of a periodically poled KTP waveguide crystal with Bragg gratings

Rafailov, Edik U.; Birkin, D.J.L.; Sibbett, W.; Battle, Philip; Fry, T.; Mohatt, D.

doi:10.1364/ol.26.001961

Cited by 24 publications

(12 citation statements)

References 6 publications

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“…The resonator was formed between the diode laser back facet and the rear facet of the nonlinear crystal. At gain switched operation, it was possible to generate light at a wavelength of 486 nm with 7.5 mW average power out of 144 mW fundamental power [159].…”

Section: Intracavity Shg Using Diode Lasersmentioning

confidence: 99%

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

Jechow¹,

Menzel

Paschke

et al. 2010

Laser & Photonics Reviews

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A review about second harmonic generation using edge emitting diode lasers and nonlinear crystals to obtain laser radiation in the blue-green spectral range is presented. Therefore, pump laser radiation with high brightness and narrow bandwidth is necessary. Thus, this review gives an overview of the advances made with distributed feedback and Bragg reflector lasers, tapered lasers and amplifiers as well as external cavity diode lasers and master oscillator power amplifier schemes to achieve high brilliance emission. Since periodically poled materials have enabled high second harmonic conversion efficiencies with low and moderate pump powers, the review is focused on frequency doubling using those materials. The most commonly used materials, their properties and limitations are discussed briefly. Single pass and resonant SHG setups with waveguide and bulk nonlinear crystals are discussed and an emphasis on building compact and integrated devices is made. PPLN waveguide crystal pumped by a DFB laser (above). Integrated SHG device on a CCP heatsink (below).

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Section: Intracavity Shg Using Diode Lasersmentioning

confidence: 99%

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

Jechow¹,

Menzel

Paschke

et al. 2010

Laser & Photonics Reviews

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“…Small beam divergence angle is favored to reduce the coupling loss between the laser and the optics, can simplify the optical system enabling direct coupling to fiber and, finally, increase the delivered optical power. Reducing beam divergence below 2-4 degrees will open up new exciting opportunities for external cavity applications and direct frequency conversion using edge-emitting lasers, an approach demonstrated for VCSELs [2]. Multimode operation.…”

Section: Introductionmentioning

confidence: 99%

“…10that both well-defined facets of the corrugated interfaces and the related natural compositional superlattice are wellRefractive index profile (thin solid line), absolute value of the electric field strength of the fundamental mode TE 1 (thick solid line) and higher-order mode TE 2 (thick dashed line) (lefthand side column) and vertical far-field intensity pattern of the fundamental mode TE 1 (right-hand side column) for four (first row), eight (second row) and twelve (third row) high-refractive index layers and the low-refractive index layers and wavelength 646 nm. In the left-hand side column the relative optical confinement factors Γ are given for lowest-order modes TE[1][2][3][4] .…”

mentioning

confidence: 99%

Longitudinal photonic bandgap crystal laser diodes with ultra-narrow vertical beam divergence

et al. 2006

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We report on lasers and light emitting diodes based on the longitudinal photonic bandgap crystal (PBC) concept. The PBC design allows achieving a robust and controllable extension of the fundamental mode over a thick multi-layer waveguide region to obtain a very large vertical optical mode spot size and a very narrow vertical beam divergence. An efficient suppression of high order modes can be realized either by the optical confinement factor selection of the fundamental mode, which is localized at the "optical defect" region and has a higher overlap with the gain region. All the other modes spread across the thicker PBC waveguide. In another approach leakage loss selection can be used to suppress excited modes in case of absorbing substrate or the substrate with a higher-refractive index. In this paper we concentrate on growth and performance of high power single mode visible (650 nm) GaInP/AlGaInP PBC lasers, giving a comprehensive example. The devices show narrow far field pattern (full width at half maximum of vertical beam divergence of about 7º), which is stable up to the highest output powers. Differential efficiency up to 85% is demonstrated. Total continuous wave single mode output power as high as 120 mW is achieved in 4 micrometer-wide stripes. Infrared (980 nm) InGaAs/AlGaAs PBC lasers with a beam divergence down to 4.2 degrees and a high temperature stability of the threshold current are also demonstrated.

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“…For efficient frequency conversion this pump source has to have a narrow spectral line width. At low power levels up to 500 mW low cost commercially available ridge waveguide (RW) lasers with an external frequency selective Bragg grating were used as pump source for SHG [2]. There an average output power of 7.5 mW at 486, 488, and 491 nm was generated in a PPKTP waveguide crystal in a picosecond pulse mode.…”

Section: Introductionmentioning

confidence: 99%

600 mW optical output power at 488 nm using a high power hybrid laser diode system and a PPMgLN bulk crystal

et al. 2006

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Frequency conversion of near infrared diode lasers provides an efficient method to generate laser radiation in the visible spectral range. There are several requirements for efficient frequency doubling like singlemode emission and good beamquality, which can be fulfilled by light sources based on master oscillator power amplifier (MOPA). This contribution reports on the generation of 600 mW output power at 488 nm by single pass frequency doubling. An InGaAs distributed feedback (DFB) laser was used as MO and an InGaAs tapered amplifier as PA in a MOPA diode laser system. A maximum output power of 4 W at 976 nm was achieved in continuous wave operation mode, at a heatsink temperature of about 0°C with this pump source. For frequency conversion a 30 mm long PPMgLN bulk crystal held at 65°C, was used in a simple single-pass configuration. A maximum conversion efficiency of 15 % and an overall wall-plug efficiency of 4 % were achieved.

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Efficient frequency doubling of a pulsed laser diode by use of a periodically poled KTP waveguide crystal with Bragg gratings

Cited by 24 publications

References 6 publications

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

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

Longitudinal photonic bandgap crystal laser diodes with ultra-narrow vertical beam divergence

600 mW optical output power at 488 nm using a high power hybrid laser diode system and a PPMgLN bulk crystal

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