集成氮化硅微腔中呼吸子频率的注入锁定研究(特邀)
Injection Locking of Breather-Soliton Frequency in Silicon Nitride Microresonator(Invited)
张一斐 1杨华山 1Nikolay Pavlov 2何吉骏 3潘时龙1
作者信息
- 1. 南京航空航天大学微波光子技术国家级重点实验室,江苏 南京 210016
- 2. Enlightra,瑞士 勒南 1020
- 3. 南京航空航天大学微波光子技术国家级重点实验室,江苏 南京 210016;空天集成电路与微系统工信部重点实验室,江苏 南京 211106
- 折叠
摘要
耗散克尔孤子是基于光学微腔产生的宽带低噪声光学频率梳,具有稳定的时域脉冲,在光谱分析、通信和精密测量等多个领域显示出极大的应用潜力.呼吸子是耗散克尔孤子的一种特殊类型,其脉冲持续时间和峰值强度会呈现周期性的振荡.研究了集成氮化硅微腔中的呼吸耗散克尔孤子,在实验过程中观察到其呼吸频率约为290 MHz且表现出约为MHz量级的不稳定性.这是其在未来应用中的主要障碍.通过在呼吸频率的波动范围内对泵浦激光器施加适当的调制信号,可以将呼吸频率注入锁定到该调制信号的频率,注入锁定的范围约为10 MHz,锁定之后线宽由11 MHz压窄为35 kHz.此外,在实验过程中还观察到了另一种由于模间相互作用而导致的呼吸子,其呼吸频率约为295 MHz.并同样对其进行了注入锁定实验,实现了呼吸频率的稳定.该研究工作为微腔中呼吸子的实际应用提供了新的思路,预期可以作为多波长源应用在多通道的调幅连续波激光雷达中.
Abstract
Dissipative Kerr solitons are broadband,low-noise optical-frequency combs generated using optical microresonators.They produce stable temporal pulses and demonstrate significant potential for use in spectral analysis,communications,and precision measurement.A breather soliton,which is a unique subset of dissipative Kerr solitons,is characterized by its rhythmic pulse-duration and peak-intensity oscillations.In this study,we scrutinized the dynamics of a breathing dissipative Kerr soliton within a silicon-nitride microresonator.We experimentally observed a breathing frequency of approximately 290 MHz,which shows instability in the megahertz range,thus posing a significant challenge to practical applications.Nevertheless,by applying an appropriate modulation signal to the pump laser within the fluctuation range of the breather's frequency,the breathing frequency can be injection locked to the frequency of the modulation signal,with the injection locking not exceeding 10 MHz,and the linewidth is compressed from 11 MHz to 35 kHz after locking.Additionally,we discovered another type of breather during our experiments,which was induced by intermodal interactions and had a breathing frequency of approximately 295 MHz.This breather was subjected to injection locking,which stabilized its frequency.Our study provides innovative avenues for the practical utilization of whispering gallery modes within microcavities,which are anticipated to be applied as multiwavelength sources in multichannel amplitude-modulated continuous-wave LiDAR technology.
关键词
集成氮化硅微腔/光学频率梳/呼吸子/注入锁定Key words
silicon nitride microresonator/optical-frequency combs/breather/injection locking引用本文复制引用
出版年
2024
NETL
NSTL
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