共查询到20条相似文献,搜索用时 15 毫秒
1.
Yang Shiquan Zhao Chunliu Meng Hongyun Ding Lei Dong Xiaoyi Yuan Shuzhong Kai Guiyun Zhao Qida 《Optical and Quantum Electronics》2003,35(1):69-73
We describe a novel erbium-doped fiber ring laser utilizing the backward amplified spontaneous emission (ASE) power as a secondary pump source so that it can operate in L-band stably. The output wavelength can be tuned in a wide range of 45 nm, from 1560 to 1605 nm. We also compared this scheme with the condition of not using the ASE as secondary pump source, and found this scheme could improve the performance of the laser when using the same components. 相似文献
2.
介绍了一种基于声光可调谐滤波器(AOTF)的可调谐掺铒光纤激光器。从掺铒光纤放大器的速率方程和传输方程出发,推导出声光可调谐掺铒光纤激光器的输出公式,理论上解释了该环形腔声光可调谐掺铒光纤激光器调谐范围仅决定于掺铒光纤的增益带宽;并在实验中测得该激光器调谐范围为1 526.05 nm到1 560.63 nm,这个区间对应着实验所得掺铒光纤自发辐射谱的增益区间,从而验证了理论推导所得结论。 相似文献
3.
Zhihui Fu Dingzhong Yang Wen Ye Jian Kong Yonghang Shen 《Optics & Laser Technology》2009,41(4):392-396
A compact erbium-doped ring-shaped fiber laser suitable for fiber-optic sensing applications has been developed. The fiber laser utilized a tunable fiber Fabry–Perot filter as the tuning element and had a moderate milli-Watt level power output over almost the whole tuning range from 1530 to 1595 nm with a power fluctuation of 0.15 dB. High repetition rate scanning of laser operation over the whole tuning range was achieved at rates of up to 200 Hz. Moreover, the performance of the ring-shaped fiber laser configured with a high-concentration erbium-doped fiber was investigated for its larger wavelength tunability of over 100 nm. Output power characteristics of this ring-shaped fiber laser were also investigated when it worked in a scanning mode. A distorted power wavelength dependence, as well as some pulsing phenomenon were observed in scanning mode. 相似文献
4.
We propose and experimentally investigate a stable and tunable dual-wavelength erbium-doped fiber (EDF) dual-ring laser scheme.
Here, two tunable bandpass filters (TBFs) are used inside the dual-ring gain cavity to generate dual-wavelength lasing. And,
due to the gain competition of the EDF gain cavity, the mode-spacing (Δλs) of lasing dual-wavelength will be limited at different operating wavelengths. Hence, the minimum and maximum mode-spacing
in the proposed EDF laser scheme are 0.75 and 15.35 nm in C-band range. Besides, the output performances of proposed fiber
laser have also been studied and analyzed. 相似文献
5.
A broadly tunable dual-wavelength erbium-doped ring fiber laser based on a high-birefringence fiber loop mirror (HiBi-FLM)
and a polarization controller is demonstrated experimentally. The measured transmission spectrum of HiBi-FLM covers a wide
range from 1525 to 1575 nm. The wavelength of proposed laser can be flexibly tunable during this range of ∼50 nm by adjusting
the polarization controller. In addition, the spacing of two wavelengths is adjustable by changing the length of HiBi fiber.
The dual-wavelength lasers with the HiBi fiber length of 1 and 2 m are experimentally demonstrated and compared. The experimental
results show that the proposed laser can stably operate on two wavelengths simultaneously at room temperature, and the output
peak power variation is about 0.5 dB during 40 min. 相似文献
6.
Baosan Wang 《Optics & Laser Technology》2010,42(2):357-361
We propose and demonstrate a novel switchable quadruple-wavelength erbium-doped fiber ring laser (EDFL) based on two-segment Lyot-Sagnac filter which is used as the wavelength-selective filter. Due to the deeply saturated spectral hole-burning (SHB) effect in an ordinary erbium-doped fiber, the laser realizes stable single-wavelength, dual-wavelength, triple-wavelength, and quadruple-wavelength output by controlling two polarization controllers (PCs) appropriately. The optical signal-to-noise ratio (OSNR) is over 30 dB. The peak fluctuation is less than ~2 dB over 1.5 h at room temperature. 相似文献
7.
A widely tunable dual-wavelength erbium-doped fiber ring laser operating in single longitudinal mode 总被引:1,自引:0,他引:1
A new mechanism to induce polarization hole burning effect in Er-doped fiber ring lasers is presented. By using this effect, incorporating with the counter-propagation of the two light beams, the inhomogeneous in the gain medium broadening was significantly increased, and thus a stable dual-frequency Er-doped fiber ring laser operating in single longitudinal mode and single-frequency was demonstrated. Frequency spacing was tunable from 0.47 GHz to THz. 相似文献
8.
9.
S. M. Zhang Q. S. Meng G. Z. Zhao 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2010,60(2):383-387
An all-fiber, wavelength-tunable, passively mode-locked
erbium-doped ring laser is presented. Erbium-doped fibers (EDF) are used as
the gain media because of their large gain bandwidth. Nonlinear polarization
rotation (NPR) plays the dual role of realizing mode-locking and effectively
adjusting the intensity-dependent loss of the cavity. An unbalanced
Mach-Zehnder interferometer (UMZI) is used as a tunable optical beam
filter. By using the UMZI and adjusting the polarization controllers (PCs),
a sub-picosecond mode-locking laser is realized that is self-starting
with central lasing wavelengths that can be accurately tuned
over a range of about ~ \sim 30 nm and also has controllable spacings
between different tunable wavelengths. 相似文献
10.
A simple switchable and tunable dual-wavelength passively mode-locked erbium-doped fiber ring laser based on nonlinear polarization rotation (NPR) effect is proposed and experimentally demonstrated. The NPR effect effectively induces wavelength- and intensity-dependent loss to readily implement stable dual-wavelength passively mode-locked operation. The wavelength switching and tuning of the dual-wavelength ultrashort pulse laser are achieved only by appropriately rotating the polarization controllers. The side-mode suppression ratio of the output pulse is larger than 41 dB over a wavelength-tuning range of 43.4 nm. Moreover, triple-wavelength ultrashort pulse can also be observed. 相似文献
11.
20-GHz broadly tunable and stable mode-locked semiconductor amplifier fiber ring laser 总被引:4,自引:0,他引:4
We present an actively mode-locked fiber ring laser that uses a single active semiconductor optical amplifier device to provide both gain and gain modulation from an external optical pulse train. The laser source generated 4.3-ps pulses at 20 GHz over a 16-nm tuning range and is stable against environmental changes and simple to build. 相似文献
12.
Tiegang Sun Yubin Guo Tianshu Wang Zhilei Song Meitong Liu 《Optical and Quantum Electronics》2018,50(3):148
A stable and tunable linear polarization single longitudinal mode fiber ring laser is proposed and demonstrated. A high extinction ratio spatial mode interference filter utilizing two-mode graded-index fiber supresses irregular side modes effectively, the combination of fiber polarizer and polarization maintaining fiber act as a polarization dependent comb filter, and tunable bandpass filter is adopted to select proper lasing wavelength. The power fluctuation and wavelength fluctuation at 1549.88 nm are less than 0.05 dB and 0.02 nm in 1 h, respectively. Only one longitudinal mode appears within a free spectral range of 7.5 GHz, and the degree of polarization in percentage is approximately as high as 99.07%. 相似文献
13.
A stable C- and L-band tunable fiber ring laser, using a two-taper Mach-Zehnder interferometer (MZI) as a filter, is proposed and demonstrated experimentally. One of the two taper waists is mechanically bent to tune the laser wavelength. Being amplified by an L-band erbium-doped fiber amplifier and an erbium-doped fiber, respectively, the fiber ring laser has a full L-band (1564-1605nm) and C-band (1550-1565nm) tuning range with a side-mode suppression ratio as high as 50dB. The laser linewidth and the minimum tuning step are related to the MZI's cavity length. It was also found that thermal annealing relieved the internal stresses of the tapers and greatly improved the laser performance. 相似文献
14.
A compact and tunable erbium-doped fiber laser is demonstrated using a highly doped fiber and a microfiber knot resonator (MKR) structure which is laid on the surface of a small peltier. The MKR functions as both a reflector and a tunable filter where tunability is achieved by varying the temperature of the resonator by heating the peltier. A stable laser output is achieved at the 1533 nm region with an optical signal to noise ratio (OSNR) of 27 dB using a 65 mW of 980 nm pump power. The operating wavelength of the laser can be tuned from 1532.60 nm to 1533.49 nm as the temperature is increased from the room temperature of 24 to 90 °C. It is observed that the operating wavelength shifts to a longer wavelength as the temperature increases with an efficiency of 12.4 pm/°C. This is due to the thermally induced optical phase shift attributable to the changes in effective refractive index and optical path length of the MKR loop. 相似文献
15.
A new, simple and efficient L-band erbium-doped fiber (EDF) laser with polarization-maintaining ring cavity is proposed and
experimentally demonstrated. The laser offers the unique advantage of being a polarization-maintaining lasing, which meets
the requirement of external electronic-optical intensity modulation for DWDM communication and interferometric fiber sensors.
Theory has been established. Experimental results are given to show that the laser has long-term stability over a couple of
hours with 35 dB signal-to-noise ratio at 1598.644 nm and tunable from 1572.167 to 1608.480 nm. 相似文献
16.
17.
All-fiber tunable ytterbium-doped double-clad fiber ring laser 总被引:6,自引:0,他引:6
We have designed and realized a cw all-fiber tunable Yb-doped double-clad fiber laser in a unidirectional ring cavity. The side-pumping V-groove technique is used, yielding very good launching efficiency of the high-power pumping laser diode, together with a compact configuration. The fiber laser delivers as much as 800 mW of power and is tunable in the spectral range 1.04-1.10 microm . The laser linewidth is ~0.1 nm . 相似文献
18.
报道了一种利用偏振控制器(PC)和保偏光纤(PMF)组成的高双折射Sagnac干涉环实现选频和调谐的环形腔掺铒光纤激光器.理论模拟了PMF和PC对波长的控制作用.实验中调节PC得到了单波长、双波长和多波长激光;并验证了滤波间隔随PMF长度的变化规律.实验中得到了斜率效率20%,3 dB线宽0.016 nm,30 dB线宽0.097 nm,边模抑制比(SMSR)40 dB左右的稳定激光输出.
关键词:
光纤激光器
Sagnac干涉环
环形腔
掺铒光纤 相似文献
19.
A stable and uniform multi-wavelength fiber laser based on the hybrid gain of a dispersion compensating fiber as the Raman gain medium and an erbium-doped fiber (EDF) is introduced. The gain competition effects in the fiber Raman amplification (FRA) and EDF amplification are analyzed and compared experimentaUy. The FRA gain mechanism can suppress the gain competition effectively and make the present multi-wavelength laser stable at room temperature. The hybrid gain medium can also increase the lasing bandwidth compared with a pure EDF laser, and improve the power conversion efficiency compared with a pure fiber Raman laser. 相似文献
20.
We fabricate a low noise erbium-doped fiber ring laser that can be continuously tuned over 102 nm by insertion of the fiber Fabry-Perot tunable filter (FFP-TF) in the ring cavity with a novel cavity structure and the optimal gain medium length. As an application of this fiber ring laser, we performed the absorption spectroscopy of acetylene (13C2H2) and hydrogen cyanide (H13C14N) and measure the absorption spectra of more than 50 transition lines of these gases with an excellent signal to noise ratio (SNR). The pressure broadening coefficients of four acetylene transition lines are obtained using this fiber ring laser and an external cavity laser diode. 相似文献