Low-threshold femtosecond optical parametric oscillator based on chirped-pulse frequency conversion

Tillman, Karl A.; Reid, Derryck T.; Artigas, David; Hellström, Jonas; Pasiskevicius, Valdas; Laurell, Fredrik

doi:10.1364/ol.28.000543

Cited by 19 publications

(11 citation statements)

References 9 publications

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“…These are the highest energies obtained from standard Cr:Colquiriite oscillators to date. Overall, these results show that Cr:Colquiriite lasers pumped with tapered diodes could become attractive alternatives to Ti:Sapphire for various applications in science and technology such as multiphoton microscopy [41], OPO pumping [42], amplifier seeding, etc.…”

Section: Introductionmentioning

confidence: 79%

“…In this section, we will present power scalability of tapered diode pumped Cr:Colquiriite lasers upon pumping by two diodes. Our main motivation for this experiments was to build a high energy Cr:Colquiriite laser that is suitable as a pump source for femtosecond optical parametric oscillators [42]. Figure 12 shows the layout of the Cr:Colquiriite laser that is pumped by two tapered diodes (TDL-1 and TDL-2).…”

Section: Cr:colquiriite Lasers Pumped By Two Tapered Diode Lasersmentioning

confidence: 99%

“…However, to our knowledge, Cr:Colquiriite laser pumped femtosecond OPOs have not been demonstrated yet. This is mainly due to the low pulse energies available from Cr:Colquiriite lasers, which is barely enough to reach the lasing threshold of optical parametric oscillators [42].…”

Section: Mode-locked Cr:licaf Laser With High Pulse Energy For Opo Apmentioning

confidence: 99%

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Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers

Demırbas¹,

Schmalz²,

Sumpf³

et al. 2011

Opt. Express

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We report compact, low-cost and efficient Cr:Colquiriite lasers that are pumped by high brightness tapered laser diodes. The tapered laser diodes provided 1 to 1.2 W of output power around 675 nm, at an electrical-to-optical conversion efficiency of about 30%. Using a single tapered diode laser as the pump source, we have demonstrated output powers of 500 mW and 410 mW together with slope efficiencies of 47% and 41% from continuous wave (cw) Cr:LiSAF and Cr:LiCAF lasers, respectively. In cw mode-locked operation, sub-100-fs pulse trains with average power between 200 mW and 250 mW were obtained at repetition rates around 100 MHz. Upon pumping the Cr:Colquiriite lasers with two tapered laser diodes (one from each side of the crystal), we have observed scaling of cw powers to 850 mW in Cr:LiSAF and to 650 mW in Cr:LiCAF. From the double side pumped Cr:LiCAF laser, we have also obtained ~220 fs long pulses with 5.4 nJ of pulse energy at 77 MHz repetition rate. These are the highest energy levels reported from Cr:Colquiriite so far at these repetition rates. Our findings indicate that tapered diodes in the red spectral region are likely to become the standard pump source for Cr:Colquiriite lasers in the near future. Moreover, the simplified pumping scheme might facilitate efficient commercialization of Cr:Colquiriite systems, bearing the potential to significantly boost applications of cw and femtosecond lasers in this spectral region (750-1000 nm).

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Section: Introductionmentioning

confidence: 79%

Section: Cr:colquiriite Lasers Pumped By Two Tapered Diode Lasersmentioning

confidence: 99%

See 1 more Smart Citation

Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers

Demırbas¹,

Schmalz²,

Sumpf³

et al. 2011

Opt. Express

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“…These conditions are also quite closely related to the idler eigenmodes of Eq. (17). Indeed, for large phase mismatches, Eqs.…”

Section: B Apodization Constraint For Chirped Qpm Opamentioning

confidence: 98%

“…(17) and (18) to develop a heuristic criterion by which apodization profiles can be constructed. These apodization regions will be appended to the ends of a nominal grating profile (e.g., linearly chirped); we illustrate different types of apodization in Section 4.…”

Section: B Adiabaticity Heuristicmentioning

confidence: 99%

Apodization of chirped quasi-phasematching devices

et al. 2013

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Chirped quasi-phasematching (QPM) optical devices offer the potential for ultrawide bandwidths, high conversion efficiencies, and high amplification factors across the transparency range of QPM media. In order to properly take advantage of these devices, apodization schemes are required. We study apodization in detail for many regimes of interest, including low-gain difference frequency generation (DFG), high-gain optical parametric amplification (OPA), and high-efficiency adiabatic frequency conversion (AFC). Our analysis is also applicable to secondharmonic generation, sum frequency generation, and optical rectification. In each case, a systematic and optimized approach to grating construction is provided, and different apodization techniques are compared where appropriate. We find that nonlinear chirp apodization, where the poling period is varied smoothly, monotonically, and rapidly at the edges of the device, offers the best performance. We consider the full spatial structure of the QPM gratings in our simulations, but utilize the first order QPM approximation to obtain analytical and semianalytical results. One application of our results is optical parametric chirped pulse amplification; we show that special care must be taken in this case to obtain high gain factors while maintaining a flat gain spectrum.

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Ultrashort‐pulse Phenomena

Powers

Spence

Tang

2004

Digital Encyclopedia of Applied Physics

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Ultrashort‐pulse phenomena are generally processes that occur on the subpicosecond to femtosecond time scale. The availability of lasers that generate ultrashort optical pulses has made possible the study of effects and processes that occur on ultrashort time scales. These measurements have led to a more fundamental understanding of processes in fields ranging from chemical kinetics to semiconductor physics. The high peak powers attainable with ultrashort‐pulse lasers has also led to new applications such as soft X‐ray generation and multiphoton microscopy. In this article, we review the generation, characterization, and a few of the applications of ultrashort optical pulses. We briefly introduce these topics with the goal of presenting an overview of the fundamental ideas. An extensive list of references is provided for each topic to give a starting point for further research.

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Low-threshold femtosecond optical parametric oscillator based on chirped-pulse frequency conversion

Cited by 19 publications

References 9 publications

Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers

Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers

Apodization of chirped quasi-phasematching devices

Ultrashort‐pulse Phenomena

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