Harmonically mode-locked VECSELs for multi-GHz pulse train generation

Saarinen, Esa J.; Härkönen, Antti; Herda, Robert; Suomalainen, Soile; Orsila, Lasse; Hakulinen, T.; Guina, Mircea; Okhotnikov, Oleg G.

doi:10.1364/oe.15.000955

Cited by 33 publications

(12 citation statements)

References 5 publications

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“…The physical mechanisms for the spectral shifts in SDLs are discussed in [12]. Similar spectral blue-shifting has been reported for the harmonically mode-locked SDL [13].…”

Section: Resultssupporting

confidence: 60%

Soliton bound states in semiconductor disk laser

et al. 2014

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We report what we believe is the first demonstration of a temporal soliton bound state in semiconductor disk laser. The laser was passively mode-locked using a quantum dot based semiconductor saturable absorber mirror (QD-SESAM). Two mode-locking regimes were observed where the laser would emit single or closely spaced double pulses (soliton bound state regime) per cavity round-trip. The pulses in soliton bound state regime were spaced by discrete, fixed time duration. We use a system of delay differential equations to model the dynamics of our device.

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“…The physical mechanisms for the spectral shifts in SDLs are discussed in [12]. Similar spectral blue-shifting has been reported for the harmonically mode-locked SDL [13].…”

Section: Resultssupporting

confidence: 60%

Soliton bound states in semiconductor disk laser

et al. 2014

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“…If the separation between the pulses becomes longer, two or more pulses have a gain advantage, which introduces modelocking instabilities or harmonic modelocking. The harmonic modelocking regime was studied in detail in [26]. The authors confirmed that strong saturation and fast recovery of the gain causes harmonic modelocking, and that the pump power has a strong effect on the pulse break up.…”

Section: Introductionmentioning

confidence: 88%

“…For DPSSLs, longer cavities and therefore lower pulse repetition rates enabled pulse energies above 10 µJ at a few MHz repetition rate and peak powers in the Megawatt regime directly from SESAM modelocked DPSSLs without further amplification [22][23][24]. So far, the lowest repetition rate of SESAM modelocked VECSELs is around 340 MHz [25,26] with no more than 15 mW average output power. The pulse energy was limited to a few nJ even for Watt-level average output powers.…”

Section: Introductionmentioning

confidence: 99%

Low repetition rate SESAM modelocked VECSEL using an extendable active multipass-cavity approach

Zaugg¹,

Hoffmann²,

Pallmann³

et al. 2012

Opt. Express

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Ultrafast VECSELs are compact pulsed laser sources with more flexibility in the emission wavelength compared to diode-pumped solidstate lasers. Typically, the reduction of the pulse repetition rate is a straightforward method to increase both pulse energy and peak power. However, the relatively short carrier lifetime of semiconductor gain materials of a few nanoseconds sets a lower limit to the repetition rate of passively modelocked VECSELs. This fast gain recovery combined with low pulse repetition rates leads to the buildup of multiple pulses in the cavity. Therefore, we applied an active multipass approach with which demonstrate fundamental modelocking at a repetition rate of 253 MHz with 400 mW average output power in 11.3 ps pulses. Tropper, "A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses," Nat. Photonics 3(12), 729-731 (2009). 8. P. Klopp, U. Griebner, M. Zorn, and M. Weyers, "Pulse repetition rate up to 92 GHz or pulse duration shorter than 110 fs from a mode-locked semiconductor disk laser," Appl. Phys. Lett. 98(7), 071103 (2011). 9. P. Klopp, F. Saas, M. Zorn, M. Weyers, and U. Griebner, "290-fs pulses from a semiconductor disk laser," Opt.Express 16 GHz passively mode-locked surface-emitting semiconductor laser with 100 mW average output power," IEEE J.

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“…Harmonic mode-locking has already been demonstrated in VECSELs, both in a coupled cavity configuration 13 and as a result of gain saturation the laser, 14 but the repetition rates achieved did not exceed 10 GHz. Here, we present a VEC-SEL emitting pulses as short as 1.1 ps at repetition rates up to 147 GHz via passive harmonic mode-locking in a coupled cavity configuration.…”

mentioning

confidence: 97%

Passively harmonically mode-locked vertical-external-cavity surface-emitting laser emitting 1.1 ps pulses at 147 GHz repetition rate

Quarterman¹,

Perevedentsev²,

Wilcox³

et al. 2010

Applied Physics Letters

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Coupled-cavity passive harmonic mode-locking of a quantum well based vertical-external-cavity surface-emitting laser has been demonstrated, yielding an output pulse train of 1.5 ps pulses at a repetition rate of 80 GHz and with an average power of 80 mW. Harmonic mode-locking results from coupling between the main laser cavity and a cavity formed within the substrate of the saturable absorber structure. Mode-locking on the second harmonic of the substrate cavity allows a train of 1.1 ps pulses to be generated at a repetition rate of 147 GHz with 40 mW average power.

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Harmonically mode-locked VECSELs for multi-GHz pulse train generation

Cited by 33 publications

References 5 publications

Soliton bound states in semiconductor disk laser

Soliton bound states in semiconductor disk laser

Low repetition rate SESAM modelocked VECSEL using an extendable active multipass-cavity approach

Passively harmonically mode-locked vertical-external-cavity surface-emitting laser emitting 1.1 ps pulses at 147 GHz repetition rate

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