Generation of femtosecond pulses from order-of-magnitude pulse compression in a synchronously pumped optical parametric oscillator based on periodically poled lithium niobate

Lefort, Laurent; Puech, K.; Butterworth, S.D.; Svirko, Yu. P.; Hanna, D.C.

doi:10.1364/ol.24.000028

Cited by 34 publications

(15 citation statements)

References 9 publications

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“…Also, we plan to use fibers with greatly increased mode areas 7 to exploit soliton formation in the f iber. Signal pulses much shorter than the pump pulses and thus increased output peak powers, as previously reported, 8 should be achievable with a fiber-feedback OPO. We also envisage the generation of significantly higher signal and idler average powers because our pump source, a passively mode-locked Yb:YAG thin disk laser, is based on a power-scalable concept.…”

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confidence: 56%

Femtosecond fiber-feedback optical parametric oscillator

Südmeyer¹,

Au²,

Paschotta³

et al. 2001

Opt. Lett.

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We demonstrate what is to our knowledge the first synchronously pumped high-gain optical parametric oscillator (OPO) with feedback through a single-mode fiber. This device generates 2.3 -2.7 W of signal power in 700 -900-fs pulses tunable in a wavelength range from 1429 to 1473 nm. The necessary high gain was obtained from a periodically poled LiTaO 3 crystal pumped with as much as 8.2 W of power at 1030 nm from a passively mode-locked Yb:YAG laser with 600-fs pulse duration and a 35-MHz repetition rate. The fiberfeedback OPO setup is compact because most of the resonator feedback path consists of a standard telecom fiber. Because of the high parametric gain, the fiber-feedback OPO is highly insensitive to intracavity losses. For the same reason, the synchronization of the cavity with the pump laser is not critical, so active stabilization of the cavity length is not required. © 2001 Optical Society of America OCIS codes: 190.4970, 190.2620, 190.7110, 320.7080, 190.4360. Synchronously pumped optical parametric oscillators (OPO's) are interesting sources of broadly wavelength-tunable ultrashort pulses as required for many applications. Recently it was demonstrated 1 that power-scalable diode-pumped thin disk lasers 2 can be passively mode locked with a semiconductor saturable-absorber mirror. 3,4Such mirrors generate multiwatt average output powers, even in the subpicosecond domain. In this Letter we show that the combination of such a pump laser with a fiber-feedback OPO, a novel type of synchronously pumped OPO in which a single-mode fiber represents most of the cavity length, results in a system with a number of attractive features. Our concept has led to a stable and compact OPO setup that is unusually insensitive to intracavity losses and drifts of the OPO cavity length. Even with nonoptimal optical components, we obtained as much as 2.7 W of average power in 900-fs pulses tunable around 1.45 mm. In contrast to many other OPO's in this pulse duration regime, the fiber-feedback OPO does not need active stabilization of the cavity length.The incorporation of a f iber into a cavity that contains bulk components will, in general, introduce substantial losses, mainly at the fiber launch. Nevertheless, high power-conversion eff iciency can be achieved if a large parametric gain is available and most of the power of the resonant wave is coupled out directly after the nonlinear crystal. Other intracavity losses then affect only a small portion of the generated power. We achieved a small-signal gain of the order of 90 dB by applying a high average pump power of as much as 8.2 W to a periodically poled LiTaO 3 (PPLT) crystal, which has a relatively high nonlinearity [d eff ഠ 9 pm͞V (Ref. 5)]. The Yb:YAG pump laser is slightly modified from that described in Ref. 1, generating pulses with a duration of 0.6 ps at a repetition rate of 35 MHz and delivering as much as ഠ11 W of average power.After passing an isolator and an attenuator, the pump beam is focused with a curved mirror ͑M 1 ͒ to a waist with 90-mm radius in...

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supporting

confidence: 56%

Femtosecond fiber-feedback optical parametric oscillator

Südmeyer¹,

Au²,

Paschotta³

et al. 2001

Opt. Lett.

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“…The pulse compression results from the Stokes pulse sweeping through the pump pulse during the crystal transit owing to the differing velocities, allowing a shorter Stokes pulse to sweep the energy out of a longer pump pulse [11]. Compression is most effective for positive detuning, corresponding to the Stokes pulse arriving at the crystal a little after the pump pulse.…”

Section: Discussionmentioning

confidence: 99%

Multi-wavelength, all-solid-state, continuous wave mode locked picosecond Raman laser

Pask¹,

Esposito²,

McConnell³

et al. 2010

Opt. Express

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We demonstrate the operation of a cascaded continuous wave (CW) mode-locked Raman oscillator. The output pulses were compressed from 28 ps at 532 nm down to 6.5 ps at 559 nm (first Stokes) and 5.5 ps at 589 nm (second Stokes). The maximum output was 2.5 W at 559 nm and 1.4 W at 589 nm with slope efficiencies up to 52%. This technique allows simple and efficient generation of short-pulse radiation to the cascaded Stokes wavelengths, extending the mode-locked operation of Raman lasers to a wider range of visible wavelengths between 500 - 650 nm based on standard inexpensive picosecond Nd:YAG oscillators.

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“…The impact of the cavity length detuning L on a synchronously pumped OPO has been reported by many authors [6][7][8][9][10][11][12][13][14] .…”

Section: Discussionmentioning

confidence: 81%

Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses

Amiard-Hudebine¹,

Freysz²

2019

Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII

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Chirp of the pulses generated in the 1.4 µm-1.8 µm spectral ranges and in a singly resonant OPO build around a 3 mm long PPLN crystal pumped at 108 MHz by 40 nJ, 1 ps chirped or 350 fs weakly chirped pump pulses centered at 1035 nm is analyzed. Whatever the chirp of the pump pulses, we achieved a pump to signal conversion efficiency > 30%. We demonstrate that by adjusting the cavity length around synchronism condition, chirped or almost chirped free (down to 80 fs) signal pulses are generated. A simple mechanism accounts for this phenomenon.

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Generation of femtosecond pulses from order-of-magnitude pulse compression in a synchronously pumped optical parametric oscillator based on periodically poled lithium niobate

Cited by 34 publications

References 9 publications

Femtosecond fiber-feedback optical parametric oscillator

Femtosecond fiber-feedback optical parametric oscillator

Multi-wavelength, all-solid-state, continuous wave mode locked picosecond Raman laser

Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses

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