Tunable self-injection locked green laser diode

Shamim, Hosne Mobarok; Ng, Tien Khee; Ooi, Boon S.; Khan, M. Z. M.

doi:10.1364/ol.43.004931

Cited by 17 publications

(10 citation statements)

References 10 publications

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“…(2) for these sparsely spaced LD modes, thus making SIL even more difficult with inferior efficiency. Nevertheless, this observed inverse relationship of tuning window with injection current is similar to that of Littrow based ECDL systems reported in the literature [17], [18], [20]. Furthermore, smooth, progressive discrete wavelength tunability across the tuning window is demonstrated by both the configuration and at any injection current.…”

Section: Resultssupporting

confidence: 87%

“…Nevertheless, within the set threshold, the measured optical linewidth and the SMSR of the short cavity system are observed to be similar to that of the long cavity system even at >130 mA. This is contrary to the other works reported in the literature where both linewidth and SMSR degrade with shorter external cavity length, and so is the tuning window [20]. We attribute this performance preservation with a minimal drop in the tuning window to the inclusion of the prism in the external cavity that facilitated better locking efficiency.…”

Section: Effect Of External Cavity Lengthcontrasting

confidence: 70%

“…Changing the external cavity length alters the performance of the SIL based ECDL system, as has been observed in the literature [20]. To investigate this effect, we reduced the external cavity length to 16 cm, by decreasing the distance between the mirror and the prism, and evaluated the system performance at both low and high injection currents at room temperature.…”

Section: Effect Of External Cavity Lengthmentioning

confidence: 78%

“…Very recently, an alternate ECDL system with wavelength filter-less element, by incorporating only a partial reflector, was proposed and demonstrated by our group on green LD emitting at ∼530 nm [20]. The system relies on self-injection locking to lock a particular wavelength mode [21], [22], thereby exhibiting a significant reduction in the optical linewidth, below 100 pm, and SMSR >10 dB, compared to the free-running (FR) laser case.…”

Section: Introductionmentioning

confidence: 99%

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Blue Laser Diode System With an Enhanced Wavelength Tuning Range

et al. 2020

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A prism-based self-injection locked seamlessly tunable blue InGaN/GaN laser diode composite cavity system is presented. A rigorous analysis of this external cavity diode laser (ECDL) system is performed at two different optical feedback powers. At 130 mA low injection, the high reflection system (HRS) exhibits a record wideband tuning span of ∼12.11 nm with a side-mode-suppression-ratio (SMSR) ≥ 15 dB, measuring as high as 40 dB, linewidth ≤110 pm, and a working power of about 3 mW. Whereas, a tuning range of 8 nm with linewidth ≤88 pm, SMSR ≥ 13 dB, reaching a maximum of 35 dB with 14.5 mW usable power is achieved from the low reflection system (LRS) at the same injection current. Moreover, an inverse relationship between the optical power and the tunability is observed in both the systems with a value as high as 180 mW exhibited by LRS configuration and attaining a tunability of 4.5 nm. Both systems highlight high stability even at higher injection currents and temperature. Such a robust, simple, and compact system may serve as a crucial light source in a plethora of diverse applications besides visible optical communications. To the best of our knowledge, this is the first report on a continuously tunable self-injection locked tunable laser system.

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Section: Resultssupporting

confidence: 87%

Section: Effect Of External Cavity Lengthcontrasting

confidence: 70%

Section: Effect Of External Cavity Lengthmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Blue Laser Diode System With an Enhanced Wavelength Tuning Range

et al. 2020

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“…The threshold current in a self-injection locked laser diode reduces from its free running counterparta clear sign of locking phenomenon [24]. By executing a two-stage selfinjection locking just below the threshold of the free running laser, at 36 mA, and 20℃ temperature, a narrow locked mode linewidth of ~66 pm at 525.26 nm is obtained and depicted in Fig.…”

Section: B Single Wavelength Generationmentioning

confidence: 92%

Single and Multiple Longitudinal Wavelength Generation in Green Diode Lasers

Shamim

Ooi

et al. 2019

IEEE J. Select. Topics Quantum Electron.

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Single and multiple wavelength laser systems are presented that employ self-injection locked InGaN/GaN green laser diode in an external cavity configuration with a partially reflective mirror. A stable and simultaneous locking of up to 4 longitudinal Fabry-Perot modes of the system cavity is demonstrated with appreciable signal-to-noise-ratio (SNR) of ~13 dB and average mode linewidth of ~150 pm. The multiwavelength spectrum exhibited a flat-top emission with nearly equal power distribution among the modes and an analogous mode spacing of ~0.5 nm. This first demonstration of multiwavelength generation source is highly attractive in a multitude of cross-disciplinary field applications besides asserting the prospects of narrow wavelength spaced multiplexed visible light communication. Moreover, an extended two-stage self-injection locked near single wavelength visible laser system is also presented. An ultra-narrow linewidth of ~34 pm is realized at 525.05 nm locked wavelength from this innovative system, with ~20 dB side-mode-suppression-ratio (SMSR); thus signifying a paradigm shift towards semiconductor lasers for near single lasing wavelength generation, which is presently dominated by other kinds of laser technologies.

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Tellurium‐stabilized blue laser diode

Chen

Wang

et al. 2021

Micro & Optical Tech Letters

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A robust and compact blue optical frequency reference within blue region was designed. A 40-mW telluriumstabilized single-frequency blue diode laser in external cavity was designed with an absorption spectroscopy method based on tellurium molecular transitions. Furthermore, the uncertainty of the frequency stabilization can be pushed to 2 Â 10 À9 at a 10-s integration time. In addition, the correspondence frequency instability was 1.3 MHz when the laser wavelength was 445.75 nm. This study indicates that high-stability frequency reference within the blue region can be achieved with an external cavity diode laser as opposed to the diode-pumped frequency-doubled solid-state laser.

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Tunable self-injection locked green laser diode

Cited by 17 publications

References 10 publications

Blue Laser Diode System With an Enhanced Wavelength Tuning Range

Blue Laser Diode System With an Enhanced Wavelength Tuning Range

Single and Multiple Longitudinal Wavelength Generation in Green Diode Lasers

Tellurium‐stabilized blue laser diode

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