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  1. Article ; Online: Optical time domain reflectometry based on a self-chaotic circular-sided microcavity laser.

    Li, Jian-Cheng / Dong, Yun-Xiao / Lei, Bin-Juan / Xiao, Jin-Long / Yang, Yue-De / Huang, Yong-Zhen

    Applied optics

    2024  Volume 63, Issue 1, Page(s) 154–158

    Abstract: A self-chaotic circular-sided square microcavity laser, with a chaos bandwidth of 12.9 GHz and a flatness of ± ... ...

    Abstract A self-chaotic circular-sided square microcavity laser, with a chaos bandwidth of 12.9 GHz and a flatness of ±3
    Language English
    Publishing date 2024-01-04
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.511255
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Narrow linewidth laser based on a sidewall grating active distributed Bragg reflector.

    Sheng, Meng-Wei / Hao, You-Zeng / Wang, Wei / Dong, Zhong / Yang, Yue-De / Xiao, Jin-Long / Huang, Yong-Zhen

    Optics express

    2024  Volume 32, Issue 7, Page(s) 12012–12023

    Abstract: We demonstrated a narrow linewidth semiconductor laser based on a deep-etched sidewall grating active distributed Bragg reflector (SG-ADBR). The coupling coefficients and reflectance were numerically simulated for deep-etched fifth-order SG-ADBR, and a ... ...

    Abstract We demonstrated a narrow linewidth semiconductor laser based on a deep-etched sidewall grating active distributed Bragg reflector (SG-ADBR). The coupling coefficients and reflectance were numerically simulated for deep-etched fifth-order SG-ADBR, and a reflectance of 0.86 with a bandwidth of 1.04 nm was obtained by the finite element method for a 500-period SG-ADBR. Then the fifth-order SG-ADBR lasers were fabricated using projection i-line lithography processes. Single-mode lasing at 1537.9 nm was obtained with a high side-mode suppression ratio (SMSR) of 65 dB, and a continuous tuning range of 10.3 nm was verified with SMSRs greater than 53 dB. Furthermore, the frequency noise power spectral density was characterized, from which a Lorentzian linewidth of 288 kHz was obtained.
    Language English
    Publishing date 2024-04-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.514686
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Chaotic microlasers caused by internal mode interaction for random number generation.

    Ma, Chun-Guang / Xiao, Jin-Long / Xiao, Zhi-Xiong / Yang, Yue-De / Huang, Yong-Zhen

    Light, science & applications

    2022  Volume 11, Issue 1, Page(s) 187

    Abstract: Chaotic semiconductor lasers have been widely investigated for generating unpredictable random numbers, especially for lasers with external optical feedback. Nevertheless, chaotic lasers under external feedback are hindered by external feedback loop time, ...

    Abstract Chaotic semiconductor lasers have been widely investigated for generating unpredictable random numbers, especially for lasers with external optical feedback. Nevertheless, chaotic lasers under external feedback are hindered by external feedback loop time, which causes correlation peaks for chaotic output. Here, we demonstrate the first self-chaotic microlaser based on internal mode interaction for a dual-mode microcavity laser, and realize random number generation using the self-chaotic laser output. By adjusting mode frequency interval close to the intrinsic relaxation oscillation frequency, nonlinear dynamics including self-chaos and period-oscillations are predicted and realized numerically and experimentally due to internal mode interaction. The internal mode interaction and corresponding carrier spatial oscillations pave the way of mode engineering for nonlinear dynamics in a solitary laser. Our findings provide a novel and easy method to create controllable and robust optical chaos for high-speed random number generation.
    Language English
    Publishing date 2022-06-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2662628-7
    ISSN 2047-7538 ; 2047-7538
    ISSN (online) 2047-7538
    ISSN 2047-7538
    DOI 10.1038/s41377-022-00890-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Narrow linewidth optical frequency comb based on a directly modulated microcavity laser with optical feedback.

    Wang, Ting / Yang, Yue-De / Hao, You-Zeng / Zhang, Zhen-Ning / Shi, Yang / Chen, You-Ling / Xiao, Jin-Long / Huang, Yong-Zhen

    Optics express

    2023  Volume 31, Issue 8, Page(s) 12200–12211

    Abstract: A narrow linewidth optical frequency comb (OFC) based on a directly modulated microcavity laser with external optical feedback is investigated numerically and demonstrated experimentally. Based on the numerical simulations with rate equations, the ... ...

    Abstract A narrow linewidth optical frequency comb (OFC) based on a directly modulated microcavity laser with external optical feedback is investigated numerically and demonstrated experimentally. Based on the numerical simulations with rate equations, the evolution of the optical and electrical spectra is presented for the direct-modulated microcavity laser with increased feedback strength, and the linewidth property is improved at suitable feedback conditions. The simulation results also show good robustness for the generated OFC in terms of feedback strength and phase. Moreover, the OFC generation experiment is performed by combining with the dual-loop feedback structure to suppress the side mode, and an OFC with a side-mode suppression ratio of 31 dB is realized. Thanks to the high electro-optical response of the microcavity laser, a 15-tone OFC with a frequency interval of 10 GHz is obtained. Finally, the linewidth of each comb tooth is measured to be around 7 kHz under the feedback power of 47 µW, which indicates an enormous compression of approximately 2000 times compared with the free-running continuous-wave microcavity laser.
    Language English
    Publishing date 2023-05-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.487449
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Self-pulsing and dual-mode lasing in a square microcavity semiconductor laser.

    Li, Jian-Cheng / Huang, Yong-Tao / Ma, Chun-Guang / Zhang, Zhen-Ning / Xiao, Jin-Long / Yang, Yue-De / Huang, Yong-Zhen

    Optics letters

    2023  Volume 48, Issue 19, Page(s) 4953–4956

    Abstract: Self-pulsing and dual-mode lasing in a square microcavity semiconductor laser are studied experimentally. Self-sustained pulses originating from undamped relaxation oscillation induced by a two-mode interaction are obtained, as the injection current is ... ...

    Abstract Self-pulsing and dual-mode lasing in a square microcavity semiconductor laser are studied experimentally. Self-sustained pulses originating from undamped relaxation oscillation induced by a two-mode interaction are obtained, as the injection current is slightly above the laser threshold. A repetition frequency of 4.4 GHz and a pulse width of 30-40 ps are obtained at a current of 8 mA. The laser switches to continuous-wave operation when the injection current is higher than a certain value, and dual-mode lasing with 30.7 GHz at 16 mA and 10.7 GHz at 27 mA are observed in the lasing spectra. Furthermore, the relative intensity noise spectra are presented to reveal the relationship between the lasing states and the dynamics induced by relaxation oscillation and mode beating.
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.501029
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Wideband multiwavelength Brillouin fiber laser with switchable channel spacing.

    Shi, Yang / Wang, Ting / Hao, You-Zeng / Bai, Hua-Yu / Yang, Yue-De / Xiao, Jin-Long / Chen, You-Ling / Huang, Yong-Zhen

    Applied optics

    2023  Volume 62, Issue 8, Page(s) 2130–2136

    Abstract: A multiwavelength Brillouin fiber laser (MBFL) with a switchable channel spacing is demonstrated using a 1.55-µm single-mode AlGaInAs/InP hybrid square-rectangular laser as a seeding source. The scheme employs a highly nonlinear fiber loop with a ... ...

    Abstract A multiwavelength Brillouin fiber laser (MBFL) with a switchable channel spacing is demonstrated using a 1.55-µm single-mode AlGaInAs/InP hybrid square-rectangular laser as a seeding source. The scheme employs a highly nonlinear fiber loop with a feedback path to generate a 10-GHz-spacing MBFL. Then, assisted by a tunable optical bandpass filter, MBFLs with spacing from 20 GHz to 100 GHz at a step of 10 GHz are generated in another highly nonlinear fiber loop based on the cavity-enhanced four-wave mixing. More than 60 lasing lines with an optical signal-to-noise ratio over 10 dB are obtained successfully in all the switchable spacings. The total output power and the channel spacing of the MBFLs are proved to be stable.
    Language English
    Publishing date 2023-05-03
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.484122
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Highly efficient waveguide-coupled output in asymmetrically deformed square cavity microlasers.

    Bai, Hua-Yu / Hao, You-Zeng / Shi, Yang / Li, Ya-Li / Xiao, Jin-Long / Yang, Yue-De / Huang, Yong-Zhen

    Optics letters

    2023  Volume 48, Issue 7, Page(s) 1874–1877

    Abstract: We propose and demonstrate deformed square cavity microlasers for realizing highly efficient output from a connected waveguide. The square cavities are deformed asymmetrically by replacing two adjacent flat sides with circular arcs to manipulate the ray ... ...

    Abstract We propose and demonstrate deformed square cavity microlasers for realizing highly efficient output from a connected waveguide. The square cavities are deformed asymmetrically by replacing two adjacent flat sides with circular arcs to manipulate the ray dynamics and couple the light to the connected waveguide. The numerical simulations show that the resonant light can efficiently couple to the fundamental mode of the multi-mode waveguide by carefully designing the deformation parameter utilizing global chaos ray dynamics and internal mode coupling. An enhancement of approximately six times in the output power is realized in the experiment compared to the non-deformed square cavity microlasers, while the lasing thresholds are reduced by about 20%. The measured far-field pattern shows highly unidirectional emission agreeing well with the simulation, which confirms the feasibility of the deformed square cavity microlasers for practical applications.
    Language English
    Publishing date 2023-05-23
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.486221
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Feedback insensitivity in a self-chaotic microcavity laser.

    Dong, Yun-Xiao / Li, Jian-Cheng / Li, Ya-Li / Shi, Yang / Xiao, Jin-Long / Yang, Yue-De / Huang, Yong-Zhen / Chen, You-Ling

    Optics letters

    2023  Volume 49, Issue 1, Page(s) 69–72

    Abstract: Insensitivity to external optical feedback is experimentally demonstrated in a self-chaotic deformed square microcavity laser for the first time, to the best of our knowledge. Both the optical and radio frequency (RF) spectra of the microlaser remain ... ...

    Abstract Insensitivity to external optical feedback is experimentally demonstrated in a self-chaotic deformed square microcavity laser for the first time, to the best of our knowledge. Both the optical and radio frequency (RF) spectra of the microlaser remain unaffected for external optical feedback with feedback strength as high as 9.9 dB. In addition, the autocorrelation function curve exhibits no time-delayed peaks. The insensitivity makes the self-chaotic microcavity laser promising for applications in feedback-insensitive optical sources.
    Language English
    Publishing date 2023-12-22
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.510363
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Optical frequency comb and picosecond pulse generation based on a directly modulated microcavity laser.

    Wu, Ji-Liang / Wang, Ting / Yang, Yue-De / Xiao, Jin-Long / Huang, Yong-Zhen

    Applied optics

    2021  Volume 60, Issue 14, Page(s) 4177–4184

    Abstract: Optical frequency comb (OFC) and picosecond pulse generation are demonstrated experimentally based on a directly modulated AlGaInAs/InP square microcavity laser. With the merit of a high electro-optics modulation response of the microcavity laser, power- ... ...

    Abstract Optical frequency comb (OFC) and picosecond pulse generation are demonstrated experimentally based on a directly modulated AlGaInAs/InP square microcavity laser. With the merit of a high electro-optics modulation response of the microcavity laser, power-efficient OFCs with good flatness are produced. Ten 8-GHz-spaced optical tones with power fluctuation less than 3 dB are obtained based on the laser modulated by a sinusoidal signal. Moreover, the comb line number is enhanced to 20 by eliminating the nonlinear dynamics through optical injection locking. Owing to the high coherence of the OFC originating from the directly modulated microcavity laser, a 6.8 ps transform-limited pulse is obtained through dispersion compensation. The optical pulse is further compressed to 1.3 ps through the self-phase modulation effect in high nonlinear fiber.
    Language English
    Publishing date 2021-05-13
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.423912
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Wideband chaotic tri-mode microlasers with optical feedback.

    Li, Ya-Li / Ma, Chun-Guang / Xiao, Jin-Long / Wang, Ting / Wu, Ji-Liang / Yang, Yue-De / Huang, Yong-Zhen

    Optics express

    2022  Volume 30, Issue 2, Page(s) 2122–2130

    Abstract: A tri-mode micro-square laser under optical feedback is proposed and demonstrated to generate chaos with the broadband flat microwave spectrum. By adjusting lasing mode intensities, frequency intervals, and optical feedback strength, we can enhance the ... ...

    Abstract A tri-mode micro-square laser under optical feedback is proposed and demonstrated to generate chaos with the broadband flat microwave spectrum. By adjusting lasing mode intensities, frequency intervals, and optical feedback strength, we can enhance the chaotic bandwidth significantly. The existence of two mode-beating peaks makes the flat bandwidth much larger than the relaxation oscillation frequency. Effective bandwidth of 35.3 GHz is experimentally achieved with the flatness of 8.3 dB from the chaotic output spectrum of the tri-mode mode laser under optical feedback.
    Language English
    Publishing date 2022-02-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.449707
    Database MEDical Literature Analysis and Retrieval System OnLINE

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