Widely tunable mid-infrared quantum cascade lasers using sampled grating reflectors

Mansuripur, Tobias S.; Menzel, S.; Blanchard, Romain; Diehl, Laurent; Pflügl, C.; Huang, Yong; Ryou, Jae‐Hyun; Dupuis, R. D.; Lončar, Marko; Capasso, Federico

doi:10.1364/oe.20.023339

Cited by 43 publications

(33 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these techniques are limited by either complex experimental arrangements [5], low power emission [6,7], the need for complex design algorithms [8], or slow condensation/evaporation processes [9]. While tunability has also been demonstrated using sampled gratings at optical [11] and mid-infrared frequencies [12], the longer wavelengths in the THz region dictate that such single-cavity devices would scale to be several tens of millimeters long, and would suffer from excessive electrical heating. To date no technique has been demonstrated that enables THz QCLs to be tuned rapidly over a wide bandwidth without loss of output power.…”

Section: Introductionmentioning

confidence: 99%

Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities

Kundu¹,

Dean²,

Valavanis³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

Discrete Vernier frequency tuning of terahertz quantum cascade lasers is demonstrated using a device comprising a two-section coupledcavity. The two sections are separated by a narrow air gap, which is milled after device packaging using a focused ion beam. One section of the device (the lasing section) is electrically biased above threshold using a short current pulse, while the other section (the tuning section) is biased below threshold with a wider current pulse to achieve controlled localized electrical heating. The resulting thermally-induced shift in the longitudinal cavity modes of the tuning section is engineered to produce either a controllable blue shift or red shift of the emission frequency. This discrete Vernier frequency tuning far exceeds the tuning achievable from standard ridge lasers, and does not lead to any corresponding change in emitted power. Discrete tuning was observed over bandwidths of 50 and 85 GHz in a pair of devices, each using different design schemes. Interchanging the lasing and tuning sections of the same devices yielded red shifts of 20 and 30 GHz, respectively. 659-670 (1984

show abstract

Section: Introductionmentioning

confidence: 99%

Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities

Kundu¹,

Dean²,

Valavanis³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

show abstract

“…15 We note that single-mode operation of tunable QCLs based on sampled gratings is very challenging and the side mode suppression ratio in these devices is typically worse than 10-20 dB. 16,17 In this report, we follow the QCL array approach, first demonstrated for monolithic mid-IR tuners, 18 to produce monolithic THz source with continuous spectral tuning from 1.9 to 3.9 THz. We integrate 10 monolithic THz DFG-QCL tuners described in Ref.…”

mentioning

confidence: 99%

Widely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays

Jiang

Jung

Jiang

et al. 2015

Applied Physics Letters

View full text Add to dashboard Cite

We demonstrate a compact monolithic terahertz source continuously tunable from 1.9 THz to 3.9 THz with the maximum peak power output of 106 μW at 3.46 THz at room temperature. The source consists of an array of 10 electrically tunable quantum cascade lasers with intra-cavity terahertz difference-frequency generation. To increase fabrication yield and achieve high THz peak power output in our devices, a dual-section current pumping scheme is implemented using two electrically isolated grating sections to independently control gain for the two mid-IR pumps.

show abstract

“…Since the conditions of wavelength resonant and phase matching are very sensitive to Δ(N eff Λ), temporal and spatial stability of the material index become more important (see also discussion below). The introduction of a tunable phase shift waveguide area will be available for this issue, which is considered as a study in the next stage [32]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Wavelength Tunability of Plastic Waveguide Laser With Asymmetric Distributed Bragg Reflectors

Nagai

Yamashita

2015

J. Lightwave Technol.

View full text Add to dashboard Cite

A wavelength tunable plastic laser with asymmetric distributed Bragg reflectors (DBRs) is proposed. This device consists of a pair of long-period waveguide gratings and a polymeric active waveguide doped with an organic dye. Due to the difference in grating periods between the two DBRs, the lasing wavelength can be tuned in accordance with a Vernier effect of the resonance between the reflection wavelengths. The plastic laser device operated with this principle has promise as a compact and widely tunable light source because a large wavelength shift in a wide emission band of an organic luminescent material can be expected with a small variation in the effective index.Index Terms-Distributed Bragg reflector, plastic laser, wavelength tuning.

show abstract

Widely tunable mid-infrared quantum cascade lasers using sampled grating reflectors

Cited by 43 publications

References 17 publications

Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities

Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities

Widely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays

Wavelength Tunability of Plastic Waveguide Laser With Asymmetric Distributed Bragg Reflectors

Contact Info

Product

Resources

About