Investigation of ellipticity and pump power in a passively mode-locked fiber laser using the nonlinear polarization rotation technique

H. Ahmad; S. I. Ooi; M. Z. A. Razak; S. R. Azzuhri; A. A. Jasim; K. Thambiratnam; M. F. Ismail; M. A. Ismail

doi:10.3788/COL201715.051402

Journals >Chinese Optics Letters >Volume 15 >Issue 5 >Page 051402 > Article

Chinese Optics Letters
Vol. 15, Issue 5, 051402 (2017)

Investigation of ellipticity and pump power in a passively mode-locked fiber laser using the nonlinear polarization rotation technique

H. Ahmad^1、*, S. I. Ooi¹, M. Z. A. Razak², S. R. Azzuhri¹, A. A. Jasim¹, K. Thambiratnam¹, M. F. Ismail¹, and M. A. Ismail¹

Author Affiliations

¹Photonics Research Centre, University of Malaya, Kuala Lumpur, Malaysia

²Institute of Microengineering and Nanoelectronics, Research Complex, University Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

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DOI: 10.3788/COL201715.051402 Cite this Article Set citation alerts

H. Ahmad, S. I. Ooi, M. Z. A. Razak, S. R. Azzuhri, A. A. Jasim, K. Thambiratnam, M. F. Ismail, M. A. Ismail. Investigation of ellipticity and pump power in a passively mode-locked fiber laser using the nonlinear polarization rotation technique[J]. Chinese Optics Letters, 2017, 15(5): 051402 Copy Citation Text

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Fig. 1. Experimental setup of the proposed system.

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Fig. 2. Ellipticity, e1, e2, and e3 at a pump power between 70–110 mW.

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Fig. 3. Example of a mode-locked pulse from an OSC at 90 mW. The pulse train is given in the inset.

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Fig. 4. Pulsewidths at 90 mW pump power at different ellipticity values (a) e1, (b) e2, and (c) e3.

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Fig. 5. SNR at 90 mW. Frequency harmonics until 1 GHz (inset).

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Fig. 6. Optical spectrum at 90 mW for a different ellipticity.

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Pump Power (mW)	Ellipticity, $e$ (deg.)	DOP (%)	Azimuth (deg.)
70	$e_{1}$ , −34.052	101.182	88.641
	$e_{2}$ , −30.884	101.515	−76.789
	$e_{3}$ , −28.298	101.795	−69.435
80	$e_{1}$ , −30.624	101.152	−54.777
	$e_{2}$ , −34.14	100.708	−59.948
	$e_{3}$ , −17.089	100.916	−41.235
90	$e_{1}$ , −34.702	100.361	−59.543
	$e_{2}$ , −37.979	100.272	−72.697
	$e_{3}$ , −20.214	100.82	−42.592
100	$e_{1}$ , −36.193	100.396	−57.384
	$e_{2}$ , −38.9	100.316	−72.155
	$e_{3}$ , −19.622	100.64.	−40.7
110	$e_{1}$ , −38.927	100.251	−60.201
	$e_{2}$ , −41.798	100.446	−89.813
	$e_{3}$ , −19.462	100.571	−37.401