Spatial and temporal coherence of broad-area lasers with grating feedback

Pan, Ming‐Wei; Evans, Daniel J.; Gray, George R.; Smith, Lee M.; Benner, Robert E.; Johnson, Carl W.; Knowlton, Daniel D.

doi:10.1364/josab.15.002531

Cited by 15 publications

(10 citation statements)

References 13 publications

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“…The chaotic state with high injected current is similar to the observation in Ref. 21. Different routes to chaos in different diode laser systems have been found, such as period-doubling route to chaos in narrow-stripe single mode diode laser [25], period-doubling and quasiperiodic route to chaos in spinpolarized vertical-cavity surface-emitting laser [26].…”

Section: Discussionsupporting

confidence: 83%

“…The fast dynamic behavior is seldom investigated in a BAL with grating feedback. Pan et al studied the dynamics of a BAL with grating feedback [21] by measuring the time series at different positions at the near field. When the injected current was low, a period-one oscillation was observed, and when the injected current was higher than 1.5 times threshold, chaotic dynamics was observed.…”

Section: Discussionmentioning

confidence: 99%

“…External-cavity grating feedback is widely used to achieve tunable high-power narrow-bandwidth BAL system. However, the dynamics of such systems have only been studied in a very few cases [21]. The research of the dynamics of BAL systems with external grating feedback is important for both the basic laser physics and the application of such a laser system.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of a green high-power tunable external-cavity broad-area GaN diode laser

et al. 2018

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of a green high-power tunable external-cavity broad-area GaN diode laser

et al. 2018

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“…This tends to degrade the quality of the beam and enlarge the spectral bandwidth. 16 This demonstrates the ability of the lens transformation system within our external cavity to suppress the BALs intrinsic lasing modes and emit narrow-band output by dramatically improving the beam quality. Controlling these parameters is essential in producing an ECDL that is reliable over its entire operating current range.…”

mentioning

confidence: 86%

Operation of a frequency-narrowed high-beam quality broad-area laser by a passively stabilized external cavity technique

Bayram

Coons

2007

Review of Scientific Instruments

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The average spectral bandwidth of a 2 W broad-area diode laser was narrowed to 5 GHz with wavelength tunability of up to 12 nm at a center wavelength of 790 nm with the use of a Littman-Metcalf external cavity in a displaced configuration. The use of lens and combined lens-laser transformation systems allowed precise alignment of the beam shaping optics, which led to significant improvements of the beam quality and an enhanced suppression of the free-running laser modes. We characterize the spatial beam quality of our external cavity diode laser by measuring the M2 quality factor and relate this to our measured bandwidths. Our external cavity can be configured over a range of cavity lengths and is modular in design, enabling access to a broad frequency spectrum for a wide range of applications that require high-power, narrow bandwidth operation.

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“…External grating feedback is widely used to achieve tunable high-power BAL systems [13][14][15][16]. However, the dynamics of such systems have only been studied in a very few cases [37].…”

Section: Dynamics Of the Green Ecdl Systemmentioning

confidence: 99%

Tunable High-Power External-Cavity GaN Diode Laser Systems in the Visible Spectral Range

Chi¹,

Jensen²,

Hansen³

et al. 2019

Laser Technology and Its Applications

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In this chapter, both blue and green high-power tunable diode laser systems based on GaN broad-area diode laser (BAL) in Littrow external cavity are demonstrated. For blue diode laser system, for high-power application, an output power around 530 mW over a 1.4 nm tunable range is obtained; for wide tunable range application, an output power around 80 mW over a 6.0 nm tunable range is obtained. For the green diode laser system, for high-power application, an output power around 480 mW with a tunable range of 2.1 nm is achieved; for wide tunable range application, an output power of 50 mW with a tunable range of 9.2 nm is achieved. The tuning range and output power optimization of an external-cavity diode laser system is investigated based on the experimental results obtained in the blue and green external-cavity GaN diode laser systems. The obtained results can be used as a guide for selecting gratings for external-cavity diode lasers for different requirements. The temporal dynamics of the green diode laser system is studied experimentally, and pulse package oscillation is observed, for the first time to our knowledge, in a BAL with an external-cavity grating feedback.

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Spatial and temporal coherence of broad-area lasers with grating feedback

Cited by 15 publications

References 13 publications

Dynamics of a green high-power tunable external-cavity broad-area GaN diode laser

Dynamics of a green high-power tunable external-cavity broad-area GaN diode laser

Operation of a frequency-narrowed high-beam quality broad-area laser by a passively stabilized external cavity technique

Tunable High-Power External-Cavity GaN Diode Laser Systems in the Visible Spectral Range

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