Ultra-narrow linewidth measurement based on Voigt profile fitting

Chen, Mo; Zhang, Meng; Wang, Jianfei; Chen, Wei

doi:10.1364/oe.23.006803

Cited by 84 publications

(44 citation statements)

References 13 publications

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“…The output power was measured by a digital power meter with a photodiode sensor head. A delayed self-heterodyne was used to measure laser linewidth [20,21]. Figure 2 presents the diagram of the linewidth measurement system.…”

Section: Methodsmentioning

confidence: 99%

A 20 W, Less-Than-1-kHz Linewidth Linearly Polarized All-Fiber Laser

et al. 2018

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We report a continuous-wave high-output power and narrow-linewidth all-fiber laser at 1550 nm with the master oscillator power amplifier (MOPA) configuration. An all-fiber distributed feedback seed laser was boosted by three cascaded fiber amplifiers. In the experiment, we adopted a large-mode-area (LMA) Er 3+ :Yb 3+-co-doped polarization-maintaining fiber to increase nonlinear thresholds and avoided the broadening of the laser linewidth. A linear-polarization fiber laser with average output power of 20 W, linewidth of 0.88 kHz, and power jitter less than 2% was finally achieved.

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Section: Methodsmentioning

confidence: 99%

A 20 W, Less-Than-1-kHz Linewidth Linearly Polarized All-Fiber Laser

et al. 2018

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“…For the DPS-DFB laser, n = 15, f c = 660 MHz, and the effective L delay = 525 km. To differentiate the 1/f frequency noise contribution, the measured spectra are fitted with Voigt functions [32,33]. The self-heterodyne spectra are plotted around f c with the QPS-DFB laser presented in red color and the DPS-DFB laser in blue color.…”

Section: Ultra-narrow-linewidth Measurementmentioning

confidence: 99%

Ultra-narrow-linewidth Al_2O_3:Er^3+ lasers with a wavelength-insensitive waveguide design on a wafer-scale silicon nitride platform

Purnawirman

Magden

et al. 2017

Opt. Express

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We report ultra-narrow-linewidth erbium-doped aluminum oxide (AlO:Er) distributed feedback (DFB) lasers with a wavelength-insensitive silicon-compatible waveguide design. The waveguide consists of five silicon nitride (SiN) segments buried under silicon dioxide (SiO) with a layer AlO:Er deposited on top. This design has a high confinement factor (> 85%) and a near perfect (> 98%) intensity overlap for an octave-spanning range across near infra-red wavelengths (950-2000 nm). We compare the performance of DFB lasers in discrete quarter phase shifted (QPS) cavity and distributed phase shifted (DPS) cavity. Using QPS-DFB configuration, we obtain maximum output powers of 0.41 mW, 0.76 mW, and 0.47 mW at widely spaced wavelengths within both the C and L bands of the erbium gain spectrum (1536 nm, 1566 nm, and 1596 nm). In a DPS cavity, we achieve an order of magnitude improvement in maximum output power (5.43 mW) and a side mode suppression ratio (SMSR) of > 59.4 dB at an emission wavelength of 1565 nm. We observe an ultra-narrow linewidth of ΔνDPS = 5.3 ± 0.3 kHz for the DPS-DFB laser, as compared to ΔνQPS = 30.4 ± 1.1 kHz for the QPS-DFB laser, measured by a recirculating self-heterodyne delayed interferometer (R-SHDI).

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“…Although optical fibers are quite suitable to generate nonlinear effects due to their high-power density and long interaction length, many applications require shorter fiber lengths with the enhanced nonlinear efficiency. Recently, a mechanism that utilizes the gain in an intra-cavity erbiumdoped fiber amplifier (EDFA) to compensate for the cavity losses and enhance the SBS efficiency was proposed [4][5][6][7][8]. It was quite interesting that a compact Brillouin erbium-doped fiber ring laser (BEFRL) successively generated stokes light with only 45-cm of erbium-doped fiber (EDF) indicating an ultra-high efficient SBS process inside the short laser cavity [4].…”

Section: Introductionmentioning

confidence: 99%