Tunable Multiwavelength Brillouin–Erbium Fiber Laser With a Polarization-Maintaining Fiber Sagnac Loop Filter

Song, Yuejiang; Zhan, Li; Hu, Songtao; Ye, Q.H.; Xia, Yuxing

doi:10.1109/lpt.2004.833097

Cited by 129 publications

(60 citation statements)

References 8 publications

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“…Polarization-maintaining fiber (PMF) is usually used in Sagnac interferometers to introduce optical path difference and cause interference between the two counterpropagating waves in the fiber loop [3][4][5][6][7]. However, conventional PMFs (e.g., Panda and bow-tie PMFs) have a high thermal sensitivity due to the large thermal expansion coefficient difference between boron-doped stress-applying parts and the cladding (normally pure silica).…”

Section: Introductionmentioning

confidence: 99%

Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer

et al. 2008

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A novel intrinsic fiber optic pressure sensor realized with a polarization-maintaining photonic crystal fiber (PM-PCF) based Sagnac interferometer is proposed and demonstrated experimentally. A large wavelengthpressure coefficient of 3:42 nm=MPa was measured using a 58:4 cm long PM-PCF as the sensing element. Owing to the inherently low bending loss and thermal dependence of the PM-PCF, the proposed pressure sensor is very compact and exhibits low temperature sensitivity.

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Section: Introductionmentioning

confidence: 99%

Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer

et al. 2008

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“…A 1 W SLM Brillouin/ytterbium fiber laser with 60 dB OSNR has been demonstrated [7]. However, for a hybrid BFL, the wavelength tunability is limited at the self-lasing range [8]. Besides, it inevitably introduces amplified spontaneous emission (ASE) noise from active fibers.…”

mentioning

confidence: 99%

Watt-level ultrahigh-optical signal-to-noise ratio single-longitudinal-mode tunable Brillouin fiber laser

et al. 2012

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A watt-level ultrahigh optical signal-to-noise ratio (OSNR) single-longitudinal-mode (SLM) tunable Brillouin fiber laser (BFL) has been demonstrated. By optimizing the length of the single mode fiber (SMF) cavity at 11m and its output ratio at sixty percent, 1.04 W output power, as well as stable SLM operation is obtained at 2.24 W pump power. The single pass cavity BFL has the advantage that Brillouin pump frequency doesn't need to match the cavity mode, thus the stability is greatly improved. As only SMF is used in the cavity, the operate wavelength can be tunable without the restriction from self lasing cavity mode. Furthermore, it proves that core-pumped single frequency fiber laser is able to generate watt-level power. The laser has excellent performance in terms of noise, linewidth, and stability. © 2012 Optical Society of America OCIS code: 060.3510, 140.3510, 190.2640. High power single-longitudinal-mode (SLM) fiber lasers with high optical signal-to-noise ratio (OSNR) have enormous applications such as remote sensing, ladar, coherent detection, and nonlinear optics. Recently, the output power of fiber lasers grew quickly, but SLM fiber lasers did not [1]. SLM fiber lasers can be boosted to watt-level [2,3], but it is still a challenge to preserve high OSNR. Besides, the output power of SLM fiber laser is also limited by the backward stimulated Brillouin scattering (SBS) [3,4]. Owing to narrow band gain of SBS, Brillouin fiber lasers (BFLs) with ~10m cavity can operate at SLM status. Though the threshold of BFLs [5] can be reduced to submilliwatt level, but the pump frequency has to match the cavity mode. This causes a big trouble for practical operation owing to the inevitable fluctuation of pump frequency. Moreover, it is difficult to output large power as the cavity is critically coupled [5]. Hybrid BFLs including active media don't need the critically coupled resonator [6], and they are able to achieve large power. A 1 W SLM Brillouin/ytterbium fiber laser with 60 dB OSNR has been demonstrated [7]. However, for a hybrid BFL, the wavelength tunability is limited at the self-lasing range [8]. Besides, it inevitably introduces amplified spontaneous emission (ASE) noise from active fibers. Different than hybrid BFLs, the BFLs without active fibers have wider tunable range, higher OSNR, and narrower linewidth. A SLM BFL with 12 m length cavity has been reported and shown stable output power [9]. In this letter, only SMF is used in the single pass cavity. By exploiting the high efficiency of SBS in fibers and the large output ratio of the lasing cavity, we demonstrate a wattlevel SLM tunable BFL with 75dB OSNR.Figure1 shows the configuration of the BFL, which consists of a tunable laser source (TLS) with 100 kHz linewidth, an erbium-doped fiber amplifier (EDFA), a polarization controller (PC), an optical circulator (OC) with 20% power loss, a 60/40 coupler with 5% loss. The cavity length is 11 m, corresponding to 18 MHz free spectral range. The laser from TLS is amplified by the EDFA as the input Brill...

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“…This happens because high BP will saturate the Erbium-doped fiber (EDF) gain faster [6]. Another method to enhance tuning range is by using a band pass filter and Sagnac loop mirror [7][8][9][10]. However, the filter limits the gain bandwidth thus reducing the number of generated Stokes signals and the Sagnac loop added complexity to the set up with similar output.…”

Section: Introductionmentioning

confidence: 99%

Impact of Booster Section Length on the Performance of Linear Cavity Brillouin-Erbium Fiber Laser

Al-Mashhadani

Jamaludin

Al-Mansoori

et al. 2014

Journal of the Optical Society of Korea

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The impact of booster section length made from passive erbium-doped fiber (EDF) on the L-band multiwavelength Brillouin-Erbium fiber laser (MBEFL) is studied experimentally in this paper. The influence on the performance of MBEFL in term of number of generated Stokes lines, tuning range and lasing threshold were investigated. A comparison was made between MBEFL without a booster section and with booster sections of different lengths. Through comparative study and at fixed BP power and 100mW of 1480 pump power, longer passive EDF length of 5m exhibits the highest average number of Stokes lines of 23 with tuning range of 14nm. In contrast, shorter passive EDF length of 1m shows the highest tuning range of 17nm and an average number of 21 Stokes lines.

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Tunable Multiwavelength Brillouin–Erbium Fiber Laser With a Polarization-Maintaining Fiber Sagnac Loop Filter

Cited by 129 publications

References 8 publications

Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer

Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer

Watt-level ultrahigh-optical signal-to-noise ratio single-longitudinal-mode tunable Brillouin fiber laser

Impact of Booster Section Length on the Performance of Linear Cavity Brillouin-Erbium Fiber Laser

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