CN111912608A - Test method and device for vibration sensitivity of transportable optical reference cavity - Google Patents
Test method and device for vibration sensitivity of transportable optical reference cavity Download PDFInfo
- Publication number
- CN111912608A CN111912608A CN202010584604.0A CN202010584604A CN111912608A CN 111912608 A CN111912608 A CN 111912608A CN 202010584604 A CN202010584604 A CN 202010584604A CN 111912608 A CN111912608 A CN 111912608A
- Authority
- CN
- China
- Prior art keywords
- frequency
- reference cavity
- optical reference
- laser
- acousto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 108
- 230000035945 sensitivity Effects 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title description 3
- 230000001133 acceleration Effects 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000000737 periodic effect Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000035559 beat frequency Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
- G01M11/081—Testing mechanical properties by using a contact-less detection method, i.e. with a camera
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H13/00—Measuring resonant frequency
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
本发明提供了一种可搬运光学参考腔振动敏感度的测试方法及装置，利用腔稳窄线宽激光器系统中光学参考腔共振峰与激光频率的对应关系，通过声光调制器周期性扫频的方式得到光学参考腔颠倒前后共振峰与声光调制器三角波扫频信号的位置关系，进而得出2g加速度变化情况下参考腔共振频率的变化值，测量出参考腔的振动敏感度。本发明方便快捷，能够降低操作复杂程度和设备成本。
The invention provides a method and device for testing the vibration sensitivity of a transportable optical reference cavity. The corresponding relationship between the resonance peak of the optical reference cavity and the laser frequency in the cavity-stabilized narrow linewidth laser system is used to periodically sweep the frequency through an acousto-optic modulator. The positional relationship between the resonant peak of the optical reference cavity and the triangular wave frequency sweep signal of the acousto-optic modulator can be obtained by means of the method, and then the change value of the resonant frequency of the reference cavity under the change of 2g acceleration is obtained, and the vibration sensitivity of the reference cavity is measured. The invention is convenient and quick, and can reduce the complexity of operation and the cost of equipment.
Description
技术领域technical field
本发明属于光学参考腔领域，涉及一种振动敏感度测试方法，尤其适用于可搬运光学参考腔的振动敏感度测试。The invention belongs to the field of optical reference cavity and relates to a vibration sensitivity test method, which is especially suitable for vibration sensitivity test of a transportable optical reference cavity.
背景技术Background technique
具有极高频率稳定度的窄线宽激光器作为高精密测量的一种手段，在基本物理常数测量、引力波探测、测地学、原子光钟等科学与技术领域有着广泛的应用。提高激光频率稳定度及压窄激光线宽的方法有多种，其中基于光学参考腔的 Pound-Drever-Hall(PDH)稳频技术是实现超窄线宽激光器最常用的方法之一。该方法将相位调制光谱技术与光外差探测技术结合，把激光频率精密锁定在光学参考腔的共振频率上，具有鉴频信号强、中心频率处斜率大、控制范围宽等特点。由于光学参考腔是窄线宽激光器的频率参考，其长度稳定性直接决定了窄线宽激光器的频率稳定性。基于超稳光学参考腔实现的超稳激光的频率稳定性已经达到10-17量级，也就是参考腔的长度稳定性已经达到了10-17量级。环境中不可避免的振动所导致的参考腔长度稳定性恶化已经成为限制超稳激光性能进一步提升的关键因素之一。因此快捷方便的测量光学参考腔的振动敏感度是进一步优化并提升系统稳定性的关键一环。As a means of high-precision measurement, narrow linewidth lasers with extremely high frequency stability are widely used in the fields of science and technology such as basic physical constant measurement, gravitational wave detection, geodesy, and atomic optical clocks. There are many methods to improve the laser frequency stability and narrow the laser linewidth. Among them, the Pound-Drever-Hall (PDH) frequency stabilization technology based on an optical reference cavity is one of the most commonly used methods to realize ultra-narrow linewidth lasers. The method combines phase modulation spectroscopy technology with optical heterodyne detection technology to precisely lock the laser frequency on the resonant frequency of the optical reference cavity. Since the optical reference cavity is the frequency reference of the narrow linewidth laser, its length stability directly determines the frequency stability of the narrow linewidth laser. The frequency stability of the ultra-stable laser based on the ultra-stable optical reference cavity has reached the order of 10-17, that is, the length stability of the reference cavity has reached the order of 10-17. The deterioration of the reference cavity length stability caused by the inevitable vibration in the environment has become one of the key factors limiting the further improvement of ultra-stable laser performance. Therefore, the quick and convenient measurement of the vibration sensitivity of the optical reference cavity is a key link to further optimize and improve the stability of the system.
光学参考腔振动敏感度是指光学参考腔的长度对振动的敏感程度，即一定幅值的加速度振动导致的参考腔长度的相对变化。由于光学参考腔通常安装与真空腔室内，且其长度的变化已经达到10-18m，无法对该长度变化进行直接测量。通常是对待测光学参考腔施加一定幅值的加速度振动，通过拍频比对的方式测量该振动导致的锁定于待测光学参考腔的激光频率变化，进而计算出参考腔腔长的相对变化。光学参考腔振动敏感度测量的一般方法是，首先将激光器输出激光锁定于一个超稳光学参考腔的共振频率，得到一束频率稳定的激光作为参考激光；其次将另一台激光器输出激光锁定于待测光学参考腔的共振频率，得到待测激光；然后人为的对待测光学参考腔施加一定幅度的加速度扰动，测量该加速度扰动导致的两束激光拍频频率的变化，从而计算出待测光学参考腔的振动敏感度。该方法一般包含两台激光器、两套锁频系统、两个光学参考腔、一套移频系统、一套拍频系统、一套加速度激励及测试系统和一套频率测试系统。如2007年S.A.Webster,M.Oxborrow和P.Gill等人(PHYSICAL REVIEW A 75,011801，2007)利用此方法对特殊切割设计的光学参考腔的振动敏感度进行了测量。The vibration sensitivity of the optical reference cavity refers to the sensitivity of the length of the optical reference cavity to vibration, that is, the relative change of the length of the reference cavity caused by the acceleration vibration of a certain amplitude. Since the optical reference cavity is usually installed in a vacuum chamber, and its length change has reached 10-18m, it is impossible to directly measure the length change. Usually, acceleration vibration of a certain amplitude is applied to the optical reference cavity to be measured, and the change of the laser frequency locked to the optical reference cavity to be measured caused by the vibration is measured by means of beat frequency comparison, and then the relative change of the cavity length of the reference cavity is calculated. The general method of measuring the vibration sensitivity of an optical reference cavity is to first lock the output laser of the laser to the resonant frequency of an ultra-stable optical reference cavity, and obtain a laser with a stable frequency as the reference laser; The resonant frequency of the optical reference cavity to be measured is used to obtain the laser to be measured; then a certain amplitude of acceleration disturbance is artificially applied to the optical reference cavity to be measured, and the change of the beat frequency of the two laser beams caused by the acceleration disturbance is measured, so as to calculate the optical frequency to be measured. Vibration sensitivity of the reference cavity. The method generally includes two lasers, two frequency locking systems, two optical reference cavities, a frequency shifting system, a beat frequency system, an acceleration excitation and testing system, and a frequency testing system. For example, in 2007, S.A.Webster, M.Oxborrow and P.Gill et al. (PHYSICAL REVIEW A 75, 011801, 2007) used this method to measure the vibration sensitivity of a specially designed optical reference cavity.
为了简化光学参考腔振动敏感度测试系统，有学者将原来的两台激光器简化为一台激光器，将一台激光器输出激光分为两束，一束激光锁定于作为参考的光学参考腔，将另一束激光通过声光调制器移频后，锁定于待测光学参考腔的共振频率，其他部分不变，仍可实现对光学参考腔振动敏感度的测试。In order to simplify the optical reference cavity vibration sensitivity test system, some scholars simplified the original two lasers into one laser, divided the output laser of one laser into two beams, one laser was locked in the optical reference cavity as a reference, and the other After a laser beam is frequency-shifted by the acousto-optic modulator, it is locked to the resonant frequency of the optical reference cavity to be measured, and other parts remain unchanged, and the vibration sensitivity of the optical reference cavity can still be tested.
随着抗振型光学参考腔的发展，利用光学参考腔与重力加速度的相对关系，上下颠倒光学参考腔可以使光学参考腔产生2g加速度变化，结合上述加速度测试方法，可以实现对光学参考腔振动敏感度的测量，该方法能够减少一套加速度激励及测试系统。如2011年S.Webster,and P.Gill(“Force-insensitive optical cavity,”Opt.Lett.36 6,3572(2011))等人利用该方法对立方体参考腔的振动敏感度进行了测量。With the development of anti-vibration optical reference cavity, using the relative relationship between the optical reference cavity and the gravitational acceleration, upside down the optical reference cavity can make the optical reference cavity produce a 2g acceleration change. Combined with the above acceleration test method, the vibration of the optical reference cavity can be realized. Sensitivity measurement, this method can reduce a set of acceleration excitation and test system. For example, in 2011, S. Webster, and P. Gill (“Force-insensitive optical cavity,” Opt. Lett. 36 6, 3572 (2011)) et al. used this method to measure the vibration sensitivity of a cubic reference cavity.
综合以上方法，振动敏感度的测试至少需要一台激光器、一个作为参考的光学参考腔、一个待测光学参考腔、两套锁频系统、一套移频系统、一套拍频系统和一套频率测试系统。该振动敏感度测试系统仍然十分复杂，不仅操作困难，而且测试仪器所需费用昂贵。本专利将提出一种更加方便快捷的光学参考腔振动敏感度测试方法。Combining the above methods, the vibration sensitivity test requires at least one laser, an optical reference cavity as a reference, an optical reference cavity to be tested, two frequency locking systems, a frequency shifting system, a beat frequency system and a set of Frequency test system. The vibration susceptibility test system is still very complex, not only difficult to operate, but also expensive to test equipment. This patent will propose a more convenient and quick method for testing the vibration sensitivity of an optical reference cavity.
发明内容SUMMARY OF THE INVENTION
为了克服现有技术的不足，本发明提供一种可搬运光学参考腔振动敏感度的测试方法，利用腔稳窄线宽激光器系统中光学参考腔共振峰与激光频率的对应关系，通过声光调制器周期性扫频的方式得到光学参考腔颠倒前后共振峰与声光调制器三角波扫频信号的位置关系，进而得出2g加速度变化情况下参考腔共振频率的变化值，测量出参考腔的振动敏感度。本发明方便快捷，能够降低操作复杂程度和设备成本。In order to overcome the deficiencies of the prior art, the present invention provides a method for testing the vibration sensitivity of a transportable optical reference cavity, which utilizes the corresponding relationship between the resonance peak of the optical reference cavity and the laser frequency in the cavity-stabilized narrow-linewidth laser system, through acousto-optic modulation The positional relationship between the resonance peak of the optical reference cavity and the triangular wave frequency sweep signal of the acousto-optic modulator before and after the reversal of the optical reference cavity is obtained by means of the periodic frequency sweep of the device, and then the change value of the resonant frequency of the reference cavity under the change of 2g acceleration is obtained, and the vibration of the reference cavity is measured. sensitivity. The invention is convenient and quick, and can reduce the complexity of operation and the cost of equipment.
本发明解决其技术问题所采用的技术方案包括以下步骤：The technical scheme adopted by the present invention to solve its technical problem comprises the following steps:
步骤一，将光源输出的激光锁定于一个光学参考腔的共振频率，获得作为参考的稳频激光；Step 1, locking the laser output from the light source to the resonance frequency of an optical reference cavity to obtain a frequency-stabilized laser as a reference;
步骤二，将稳频激光进行移频后，耦合入待测光学参考腔；Step 2: After frequency-shifting the frequency-stabilized laser, it is coupled into the optical reference cavity to be measured;
步骤三，使用声光调制器改变移频频率，测量从待测光学参考腔后透射的激光光强，当透射激光光强最大时，激光与待测光学参考腔达到共振，此时声光调制器的驱动频率记为f0；Step 3: Use the acousto-optic modulator to change the frequency shift frequency, and measure the laser light intensity transmitted from the optical reference cavity to be measured. When the transmitted laser light intensity is the largest, the laser and the optical reference cavity to be measured reach resonance, and the acousto-optic modulation The drive frequency of the device is recorded as f 0 ;
步骤四，将声光调制器的驱动信号源输出设置为周期性三角波，调制后输出的信号频率最小值为fmin，最大值为fmax，该频率范围覆盖f0；当驱动信号源从最小频率扫描至最大频率时，透射激光光强的最大值对应的频率为f1；Step 4: Set the output of the driving signal source of the acousto-optic modulator as a periodic triangular wave, the minimum value of the output signal frequency after modulation is f min , the maximum value is f max , and the frequency range covers f 0 ; when the driving signal source is from the minimum When the frequency is scanned to the maximum frequency, the frequency corresponding to the maximum value of the transmitted laser light intensity is f 1 ;
步骤五，将待测光学参考腔上下颠倒，当驱动信号源从最小频率扫描至最大频率时，透射激光光强的最大值对应的频率为f2；Step 5: Upside down the optical reference cavity to be measured, when the driving signal source scans from the minimum frequency to the maximum frequency, the frequency corresponding to the maximum value of the transmitted laser light intensity is f 2 ;
步骤六，将待测光学参考腔颠倒前后对应的频率做差，除以加速度变化量2g和激光的中心频率f的乘积，得到该光学参考腔的振动敏感度，即(f2-f1)/(2g*f)。Step 6: Make the difference between the corresponding frequencies before and after the inversion of the optical reference cavity to be tested, and divide it by the product of the acceleration change 2g and the center frequency f of the laser to obtain the vibration sensitivity of the optical reference cavity, namely (f 2 -f 1 ) /(2g*f).
本发明还提供一种实现上述方法的装置，包括激光器、伺服控制系统、光学参考腔、声光调制器、驱动信号源、光电探测器和示波器。The present invention also provides a device for implementing the above method, including a laser, a servo control system, an optical reference cavity, an acousto-optic modulator, a driving signal source, a photodetector and an oscilloscope.
所述的激光器的输出激光通过伺服控制系统锁定于光学参考腔的共振频率，将该激光器的输出激光通过声光调制器移频后耦合入待测光学参考腔，并由光电探测器检测透射出待测光学参考腔的激光；改变声光调制器的移频频率，当光电探测器输出电压最大时判定激光与待测光学参考腔达到共振，此时声光调制器驱动频率记为f0，并将光电探测器输出的电压信号连接到示波器的一个输入端；将声光调制器的驱动信号源输出设置为周期性三角波，调制后输出的信号频率最小值为fmin、最大值为fmax，该频率范围覆盖f0；将三角波信号输出至示波器的另一个输入端口；当信号源从最小频率扫描至最大频率后，在示波器上同时显示一个三角波信号和一个待测光学参考腔共振峰信号；将待测光学参考腔上下颠倒，在示波器上显示颠倒后的待测光学参考腔共振峰信号；根据两个共振峰信号计算待测光学参考腔的振动敏感度。The output laser of the laser is locked to the resonance frequency of the optical reference cavity by the servo control system, and the output laser of the laser is frequency-shifted by the acousto-optic modulator and then coupled into the optical reference cavity to be measured, and detected and transmitted by the photodetector. The laser of the optical reference cavity to be measured; change the frequency-shift frequency of the acousto-optic modulator, when the output voltage of the photodetector is at its maximum, it is determined that the laser and the optical reference cavity to be measured reach resonance, and the driving frequency of the acousto-optic modulator is denoted as f 0 , Connect the voltage signal output by the photodetector to an input end of the oscilloscope; set the output of the driving signal source of the acousto-optic modulator as a periodic triangular wave, the minimum value of the modulated output signal frequency is f min , and the maximum value is f max , the frequency range covers f 0 ; output the triangular wave signal to another input port of the oscilloscope; when the signal source sweeps from the minimum frequency to the maximum frequency, a triangular wave signal and a formant signal of the optical reference cavity to be tested are displayed on the oscilloscope at the same time ; Invert the optical reference cavity to be tested upside down, and display the inverted optical reference cavity formant signal on the oscilloscope; calculate the vibration sensitivity of the optical reference cavity to be tested according to the two formant signals.
本发明的有益效果是：由于采用声光调制器扫频的方式测量出待测光学参考腔颠倒前后共振信号在声光调制器扫频曲线中对应的频率，通过二者做差计算出2g加速度变化导致的参考腔共振频率变化，进而计算出该参考腔的振动敏感度，本发明比现有技术更加方便快捷，至少能够节省一套锁频系统、一套拍频系统、一套频率测试系统等装置，能够显著降低可搬运光学参考腔振动敏感度测试的经济成本和时间成本。The beneficial effects of the invention are as follows: because the frequency of the resonance signal before and after the reversal of the optical reference cavity to be tested is measured in the frequency sweep curve of the acousto-optic modulator, the 2g acceleration is calculated by making the difference between the two. The resonant frequency of the reference cavity caused by the change is changed, and then the vibration sensitivity of the reference cavity is calculated. The present invention is more convenient and quicker than the prior art, and at least one set of frequency locking system, one set of beat frequency system and one set of frequency testing system can be saved. Such devices can significantly reduce the economic cost and time cost of vibration sensitivity testing of transportable optical reference cavities.
附图说明Description of drawings
图1是S.A.Webster,M.Oxborrow,and P.Gill等人的测试原理图；Figure 1 is the test schematic diagram of S.A.Webster, M.Oxborrow, and P.Gill et al;
图2是本发明的测试原理图；Fig. 2 is the test principle diagram of the present invention;
图3是参考腔颠倒前后共振信号的频率关系示意图。FIG. 3 is a schematic diagram of the frequency relationship of the resonance signal before and after the reference cavity is inverted.
具体实施方式Detailed ways
下面结合附图和实施例对本发明进一步说明，本发明包括但不仅限于下述实施例。The present invention will be further described below with reference to the accompanying drawings and embodiments, and the present invention includes but is not limited to the following embodiments.
本发明通过以下技术方案来实现：The present invention realizes through the following technical solutions:
步骤一，将激光器输出激光通过伺服控制系统(锁频系统)锁定于光学参考腔1 的共振频率，获得作为参考的稳频激光Step 1: Lock the laser output laser to the resonance frequency of the optical reference cavity 1 through the servo control system (frequency locking system) to obtain a frequency-stabilized laser as a reference
步骤二，将该激光器输出激光分出一束，通过声光调制器移频后，耦合入待测光学参考腔2In
步骤三，(利用光学参考腔的驻波效应，当激光频率与参考腔共振频率的差值小于参考腔线宽的一半时，激光能够在光学参考腔内较为明显的积聚，同时由于参考腔腔镜不是全反镜，有一部分激光从光学参考腔后透射，当透射激光光强最大，即光电探测器输出电压幅值最大时，激光与参考腔达到共振；)选择合适的声光调制器，改变声光调制器的移频频率，通过判断光学参考腔2后光电探测器输出电压的大小，使激光与光学参考腔2达到共振，此时声光调制器驱动频率记为f0，并将光电探测器输出的电压信号连接到示波器的一个输入端。Step 3: (Using the standing wave effect of the optical reference cavity, when the difference between the laser frequency and the resonant frequency of the reference cavity is less than half of the line width of the reference cavity, the laser light can accumulate in the optical reference cavity more obviously, and because of the reference cavity cavity The mirror is not a total reflection mirror, and a part of the laser is transmitted from the optical reference cavity. When the transmitted laser light intensity is the largest, that is, when the output voltage amplitude of the photodetector is the largest, the laser and the reference cavity reach resonance;) Select the appropriate acousto-optic modulator, Change the frequency shift frequency of the acousto-optic modulator, and make the laser and the
步骤四，将声光调制器的驱动信号源输出设置为周期性三角波调制状态，调制后输出的信号频率最小值为fmin、最大值为fmax，该频率范围覆盖f0。同时将三角波信号输出至示波器的另一个输入端口，当信号源从最小频率扫描至最大频率后，在示波器上同时显示一个三角波信号和一个光学参考腔共振峰信号。如图3所示，黑色实线是三角波扫描信号，由于信号源输出的扫描频率是均匀变化，从左到右对应的频率均匀的由fmin变为fmax，黑色点虚线是参考腔颠倒前由光电探测器输出的共振峰信号，根据其与三角波的相对位置可知，该共振信号的最大值对应的频率为f1。In step 4, the output of the driving signal source of the acousto-optic modulator is set to a periodic triangular wave modulation state, and the minimum and maximum frequency of the modulated output signal is f min and f max , and the frequency range covers f 0 . At the same time, the triangular wave signal is output to the other input port of the oscilloscope. When the signal source sweeps from the minimum frequency to the maximum frequency, a triangular wave signal and an optical reference cavity formant signal are displayed on the oscilloscope at the same time. As shown in Figure 3, the black solid line is the triangular wave scanning signal. Since the scanning frequency output by the signal source changes uniformly, the corresponding frequency from left to right is uniformly changed from f min to f max , and the black dotted line is the reference cavity before the reversal According to the relative position of the resonance peak signal output by the photodetector and the triangular wave, the frequency corresponding to the maximum value of the resonance signal is f 1 .
步骤五，将待测光学参考腔，即，光学参考腔2上下颠倒，使其产生2g加速度差值，此时由于参考腔所受加速度产生变化，导致参考腔的共振频率发生了变化，颠倒后的共振信号在三角波扫描信号中的相对位置如图3中黑色长虚线所示，该共振信号最大值对应的频率为f2。Step 5: Turn the optical reference cavity to be measured, that is, the
步骤六，将待测光学参考腔颠倒前后对应的频率做差，除以加速度变化量2g和激光的中心频率f的乘积，可以得到该光学参考腔的振动敏感度，即：(f2-f1)/(2g*f)。Step 6: Make the difference between the corresponding frequencies before and after the inversion of the optical reference cavity to be tested, and divide it by the product of the acceleration change 2g and the center frequency f of the laser to obtain the vibration sensitivity of the optical reference cavity, namely: (f 2 -f 1 )/(2g*f).
下面以实验室已有的可搬运立方体参考腔为例，结合图3，对本发明作进一步的说明。The present invention will be further described below by taking the existing transportable cube reference cavity in the laboratory as an example and in conjunction with FIG. 3 .
步骤一，将型号为DL pro的半导体激光器输出激光经相位调制后耦合入光学参考腔1Step 1: The output laser of the semiconductor laser model DL pro is phase-modulated and coupled into the optical reference cavity 1
步骤二，将该激光器输出激光经偏振分束棱镜分出一束，通过驱动频率为80MHz的声光调制器移频后，将一级衍射光先耦合入一根长5m的单模光纤，再将光纤输出激光耦合入待测光学参考腔2。In
步骤三，将光学参考腔1和光学参考腔2透射信号同时连接到示波器(型号为DPO5104)的两个输入端口，同时大幅扫描激光器中压电陶瓷的驱动电压，在示波器上探测到两个光学参考腔的共振信号，根据耦合入光学参考腔1的激光的调制频率，判断光学参考腔1和光学参考腔2透射信号主峰的频率差，根据该频率差调整声光调制器的驱动频率。此例中假设光学参考腔2的共振频率比光学参考腔1的共振频率大 10MHz。Step 3: Connect the optical reference cavity 1 and
步骤四，通过伺服控制系统将半导体激光器输出激光锁定于步骤三中光学参考腔1的共振频率。In step 4, the output laser of the semiconductor laser is locked to the resonance frequency of the optical reference cavity 1 in step 3 through the servo control system.
步骤五，将声光调制器的驱动信号源(型号为SMB100A)的输出信号设置为周期性三角波调制模式，中心频率设置为90MHz，扫描范围从89.9MHz到90.1MHz，即fmin＝89.9MHz，fmax＝90.1MHz，扫描步进为100Hz/10ms，从小到大一个扫描过程需要时间10s。Step 5: Set the output signal of the driving signal source of the acousto-optic modulator (model SMB100A) to the periodic triangular wave modulation mode, the center frequency is set to 90MHz, and the scanning range is from 89.9MHz to 90.1MHz, that is, f min =89.9MHz, f max =90.1MHz, the scanning step is 100Hz/10ms, and a scanning process from small to large takes 10s.
步骤六，将声光调制器的驱动信号源的三角波调制信号输出至示波器的另一个输入端口，当信号源从最小频率扫描至最大频率后，在示波器上同时显示一个三角波信号和一个光学参考腔共振峰信号。根据光学参考腔2颠倒前共振峰与扫描信号最小值之间的时间差，计算出光学参考腔2颠倒前共振峰对应的频率f1＝90.024MHz。Step 6: Output the triangular wave modulation signal of the driving signal source of the acousto-optic modulator to another input port of the oscilloscope. When the signal source sweeps from the minimum frequency to the maximum frequency, a triangular wave signal and an optical reference cavity are displayed on the oscilloscope at the same time. formant signal. According to the time difference between the resonance peak before the
步骤七，将待测光学参考腔，即，光学参考腔2上下颠倒，使其产生2g加速度差值，此时由于参考腔所受加速度产生变化，导致参考腔的共振频率发生了变化，光学参考腔2颠倒后的共振峰信号f2＝90.052MHz。Step 7: Turn the optical reference cavity to be measured, that is, the
步骤八，将待测光学参考腔颠倒前后对应的频率做差，除以加速度变化量2g和激光的中心频率f(该激光的中心频率为4.29×1014Hz)的乘积，可以得到该光学参考腔的振动敏感度，即：(f2-f1)/(2g*f)＝3.26×10-11/g。Step 8: Make the difference between the corresponding frequencies before and after the inversion of the optical reference cavity to be tested, and divide it by the product of the acceleration change 2g and the center frequency f of the laser (the center frequency of the laser is 4.29×10 14 Hz), and the optical reference can be obtained. The vibration sensitivity of the cavity, namely: (f 2 −f 1 )/(2g*f)=3.26×10 −11 /g.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010584604.0A CN111912608B (en) | 2020-06-24 | 2020-06-24 | Test method and device for vibration sensitivity of transportable optical reference cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010584604.0A CN111912608B (en) | 2020-06-24 | 2020-06-24 | Test method and device for vibration sensitivity of transportable optical reference cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111912608A true CN111912608A (en) | 2020-11-10 |
| CN111912608B CN111912608B (en) | 2022-01-18 |
Family
ID=73226619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010584604.0A Active CN111912608B (en) | 2020-06-24 | 2020-06-24 | Test method and device for vibration sensitivity of transportable optical reference cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111912608B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122888A (en) * | 2021-10-22 | 2022-03-01 | 中国科学院国家授时中心 | Frequency-tunable and transportable frequency-stabilized laser system for optical clock |
| CN114530752A (en) * | 2022-01-11 | 2022-05-24 | 中国科学院国家授时中心 | Improved mean shift algorithm-based automatic locking system for ultrastable laser |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140320856A1 (en) * | 2013-04-26 | 2014-10-30 | Entanglement Technologies, Inc. | Cavity enhanced absorption spectroscopy with a laser modulation side-band frequency locked to the cavity |
| CN106684679A (en) * | 2017-02-28 | 2017-05-17 | 中国科学院国家授时中心 | Light frequency transmission used all-fiber narrow linewidth fiber laser device and the method thereof |
| US20180321641A1 (en) * | 2017-05-01 | 2018-11-08 | AOSense, Inc. | Architecture for compact cold atom clocks |
| CN109828342A (en) * | 2019-02-28 | 2019-05-31 | 中国科学院国家授时中心 | The multi-functional super steady optical reference chamber of one kind and its installation method |
| CN110631807A (en) * | 2019-09-18 | 2019-12-31 | 中国科学院国家授时中心 | Device and method for state detection of mode-locked laser based on optical resonator |
| CN110783806A (en) * | 2019-10-31 | 2020-02-11 | 中国科学院国家授时中心 | An automatic locking and relocking system of an ultra-stable laser and its working method |
| CN111129947A (en) * | 2019-12-11 | 2020-05-08 | 中国科学技术大学 | Laser frequency stabilization device and method, and semiconductor laser assembly using the same |
| CN111324933A (en) * | 2020-02-19 | 2020-06-23 | 中国科学院国家授时中心 | Method for analyzing vibration sensitivity of vibration-resistant optical reference cavity and designing reference cavity |
-
2020
- 2020-06-24 CN CN202010584604.0A patent/CN111912608B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140320856A1 (en) * | 2013-04-26 | 2014-10-30 | Entanglement Technologies, Inc. | Cavity enhanced absorption spectroscopy with a laser modulation side-band frequency locked to the cavity |
| CN106684679A (en) * | 2017-02-28 | 2017-05-17 | 中国科学院国家授时中心 | Light frequency transmission used all-fiber narrow linewidth fiber laser device and the method thereof |
| US20180321641A1 (en) * | 2017-05-01 | 2018-11-08 | AOSense, Inc. | Architecture for compact cold atom clocks |
| CN109828342A (en) * | 2019-02-28 | 2019-05-31 | 中国科学院国家授时中心 | The multi-functional super steady optical reference chamber of one kind and its installation method |
| CN110631807A (en) * | 2019-09-18 | 2019-12-31 | 中国科学院国家授时中心 | Device and method for state detection of mode-locked laser based on optical resonator |
| CN110783806A (en) * | 2019-10-31 | 2020-02-11 | 中国科学院国家授时中心 | An automatic locking and relocking system of an ultra-stable laser and its working method |
| CN111129947A (en) * | 2019-12-11 | 2020-05-08 | 中国科学技术大学 | Laser frequency stabilization device and method, and semiconductor laser assembly using the same |
| CN111324933A (en) * | 2020-02-19 | 2020-06-23 | 中国科学院国家授时中心 | Method for analyzing vibration sensitivity of vibration-resistant optical reference cavity and designing reference cavity |
Non-Patent Citations (3)
| Title |
|---|
| STEPHEN WEBSTER ET AL.: "Force-insensitive optical cavity", 《OPTICS LETTERS》 * |
| XU GUANJUN ET AL.: "The stiffness analysis of vibration-insensitive spherical optical reference cavities", 《2016 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (IFCS)》 * |
| 刘军 等: "高精细度光学参考腔的自主化研制", 《物理学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122888A (en) * | 2021-10-22 | 2022-03-01 | 中国科学院国家授时中心 | Frequency-tunable and transportable frequency-stabilized laser system for optical clock |
| CN114530752A (en) * | 2022-01-11 | 2022-05-24 | 中国科学院国家授时中心 | Improved mean shift algorithm-based automatic locking system for ultrastable laser |
| CN114530752B (en) * | 2022-01-11 | 2024-05-03 | 中国科学院国家授时中心 | Ultra-stable laser automatic locking system based on improved mean shift algorithm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111912608B (en) | 2022-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| De La Rue et al. | Acoustic-surface-wave amplitude and phase measurements using laser probes | |
| US4702600A (en) | Method and apparatus for measuring angular rate with a passive optical resonator | |
| US4135822A (en) | Laser gyroscope | |
| CN104316186B (en) | A kind of spectral measurement method of optically-based frequency comb | |
| CN102305591B (en) | Multi-frequency synchronization phase laser ranging device and method based on dual-acousto-optic shift frequency | |
| CN113433570B (en) | Atmospheric carbon dioxide concentration detection differential absorption laser radar system | |
| CN109029740B (en) | Device and method for measuring atomic hyperfine structure | |
| CN114018171B (en) | High-resolution strain sensor based on differential optical fiber resonant cavity | |
| CN110837109B (en) | Atomic excited state spectrum obtaining method and hyperfine energy level measuring method and device | |
| Ye et al. | Ultrastable optical frequency reference at 1.064/spl mu/m using a C/sub 2/HD molecular overtone transition | |
| CN111912608B (en) | Test method and device for vibration sensitivity of transportable optical reference cavity | |
| JP2007285898A (en) | Laser vibrometer | |
| Doeleman et al. | Brillouin optomechanics in the quantum ground state | |
| JP7590525B2 (en) | Measuring device and measuring method | |
| US6559946B2 (en) | Method and apparatus to minimize effects of ASE in optical measurements | |
| CN101650226A (en) | Micro phase delay measuring device for optical element based on laser feedback | |
| JP3388227B2 (en) | Optical dispersion measuring apparatus and measuring method using the same | |
| CN116298551B (en) | Plug-and-play type quantum sensing electromagnetic wave measurement system based on modularization | |
| CN117452084A (en) | Device based on fiber phase modulator and optical ultrastable cavity linear frequency sweep | |
| CN100451581C (en) | Method and device for measuring laser wavelength by heterodyne interferometry | |
| JPS63241440A (en) | Method and device for measuring frequency response of optical detector | |
| GB1576941A (en) | Laser gyroscope | |
| JP2023000359A (en) | Optical comb generation apparatus for optical comb distance measurement | |
| CN107218902B (en) | Fiber Bragg Grating Signal Demodulation System Based on Dual Laser Source Frequency Locking and Beat Frequency Measurement | |
| CN113097842A (en) | Polarization maintaining fiber-based ultrastable laser system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |