Continuous tuning of a continuous-wave periodically poled lithium niobate optical parametric oscillator by use of a fan-out grating design

Powers, Peter E.; Kulp, Thomas J.; Bisson, Scott E.

doi:10.1364/ol.23.000159

Cited by 181 publications

(77 citation statements)

References 5 publications

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“…Several methods have been studied to achieve tunable QPM devices, such as angle tuning [31], aperiodic QPM grating [32,33], tapered waveguide [34] and temperature tuning [35]. Compared with other tuning methods, temperature tuning is more attractive because of its simplicity.…”

Section: Motivation Of the Researchmentioning

confidence: 99%

Tunable second harmonic generation devices with an integrated micro-heater

Gan

Liang

2008

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII

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Single-pass frequency conversion by a nonlinear optical crystal is an attractive method to generate coherent radiation in various spectral domains from ultraviolet to mid-infrared. Wavelength converters based on quasi-phase matched (QPM) periodically poled lithium niobate (PPLN) have proved to be important wavelength conversion devices for many useful applications. This thesis develops a novel integration design for temperature controlling and temperature wavelength tuning of a QPM-PPLN waveguide wavelength converter. A Cr/Pt/Au thin film alloy layer is deposited on a PPLN device with a polymer buffer layer to work as a micro-heater and a temperature sensor at the same time. The temperature of the device can be tailored by applying current to the micro-heater layer, which changes the effective period of the QPM grating and thus the QPM wavelength through the thermal optical effect (TOE). The device's temperature can be monitored by measuring the resistance change of the alloy layer. Micro-heater design and mode profile simulation are involved in the thesis. The entire device fabrication process is introduced. Both electrical and optical features of the device are characterized and discussed. In contrast to the conventional temperature tuning method based on a bulky oven, the proposed design has some excellent characteristics such as compact package size and low power consumption.iii

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Section: Motivation Of the Researchmentioning

confidence: 99%

Tunable second harmonic generation devices with an integrated micro-heater

Gan

Liang

2008

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII

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“…The strength of continuous wave, mid-infrared, optical parametric oscillators (OPOs) lies in their ability to cover a broad spectral range, while offering high power and exceptional beam characteristics in terms of beam profile, linewidth and stability [1][2][3][4][5][6]. This makes the OPO an excellent light source for spectroscopic purposes, especially when it is operated in the 3-5 µm wavelength range where many molecules important for life science have strong characteristic absorptions.…”

Section: Introductionmentioning

confidence: 99%

Continuous wave optical parametric oscillator for quartz-enhanced photoacoustic trace gas sensing

et al. 2007

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“…Although picosecond green sources can provide high average powers, the ability to power scale green-pumped picosecond OPOs together with rapid tuning has been challenging [5]. While power scaling in OPOs depends on the available pump power and optimization of the output coupling [6], rapid tuning relies on the properties of the nonlinear material itself [7]. Several near-infrared OPOs based on birefringent nonlinear crystals such as LiB3O5 (LBO) [2] and KTiOPO4 (KTP) [8,9], and quasi-phase-matched nonlinear materials such as periodically-poled KTP (PPKTP) [3], MgO:sPPLT [10], and MgO:PPLN [11] have been previously demonstrated.…”

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confidence: 99%

Fiber-laser-based, green-pumped, picosecond optical parametric oscillator using fan-out grating PPKTP

2015

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We report a stable, Yb-fiber-laser-based, green-pumped, picosecond optical parametric oscillator (OPO) for the near-infrared based on the nonlinear crystal, PPKTP, using fan-out grating design, and operating near room temperature. The OPO is continuously tunable across 726-955 nm in the signal and 1201-1998 nm in the idler, resulting in a total signal plus idler wavelength coverage of 1026 nm by grating tuning at a fixed temperature. The device generates up to 580 mW of average power in the signal at 765 nm and 300 mW in the idler at 1338 nm with an overall extraction efficiency of up to 52% and a pump depletion >76%. The extracted signal at 765 nm and idler at 1746 nm exhibit excellent passive power stability better than 0.5% and 0.8% rms, respectively, over 1 hour, in good beam quality with TEM00 mode profile. The output signal pulses have Gaussian temporal duration of 13.2 ps with a FWHM spectral bandwidth of 3.4 nm at 79.5 MHz repetition rate. Power scaling limitations of the OPO due to the material properties of PPKTP are studied. © 2015 Optical Society of America OCIS codes : (190.4360) Nonlinear optics, devices; (190.7110) Ultrafast nonlinear optics; (190.4400) Nonlinear optics, materials; (190.4970 Rapid and continuously tunable, high-power, picosecond optical parametric oscillators (OPOs) in the near-infrared wavelength range are highly desirable for the advancement of microscopic techniques such as Coherent Anti-Stokes Raman Scattering (CARS), enabling several applications in biology and medicine [1][2][3]. Such OPOs are typically pumped in the green, which in turn rely on second harmonic generation (SHG) of mode-locked Nd-based solid-state or Yb-based fiber lasers [4]. Although picosecond green sources can provide high average powers, the ability to power scale green-pumped picosecond OPOs together with rapid tuning has been challenging [5]. While power scaling in OPOs depends on the available pump power and optimization of the output coupling However, in all these reports wavelength tuning has been achieved by varying the temperature of the nonlinear crystal, which is a relatively slow process.Here we report a stable, picosecond OPO based on fan-out design in PPKTP, enabling rapid grating tuning by translation of the nonlinear crystal while operating close to room temperature. The OPO, which is synchronously pumped by a mode-locked frequency-doubled Yb-fiber laser in the green, can provide continuous tuning over 726-955 nm in the signal wavelength range together with corresponding idler tuning across 1201-1998 nm. A maximum average power of 580 mW at 765 nm in the signal and 300 mW at 1338 nm in the idler, an overall extraction efficiency of up to 52%, and pump depletion >76% have been obtained. To the best of our knowledge, this is the first report of a picosecond OPO based on PPKTP using a fan-out grating design. The schematic of the experimental setup is shown in Fig. 1. The primary pump source is a mode-locked Yb-fiber laser (Fianium, FP1060-20) delivering ~20 ps pulses at 79.5 MHz repet...

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Continuous tuning of a continuous-wave periodically poled lithium niobate optical parametric oscillator by use of a fan-out grating design

Cited by 181 publications

References 5 publications

Tunable second harmonic generation devices with an integrated micro-heater

Tunable second harmonic generation devices with an integrated micro-heater

Continuous wave optical parametric oscillator for quartz-enhanced photoacoustic trace gas sensing

Fiber-laser-based, green-pumped, picosecond optical parametric oscillator using fan-out grating PPKTP

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