title: Note: Broadly tunable all-fiber ytterbium laser with 0.05 nm spectral width based on multimode interference filter.
abstract: A multimode interference filter with narrow transmission bandwidth and large self-imaging wavelength interval is constructed and implemented in an ytterbium doped fiber laser in all-fiber format for broad wavelength tunability as well as narrow spectral width of the output beam. The peak transmission wavelength of the multimode interference filter was tuned with the help of a standard in-fiber polarization controller. With this simple mechanism more than 30 nm (1038 nm-1070 nm) tuning range is demonstrated. The spectral width of the output beam from the laser was measured to be 0.05 nm.
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Pranab K
authors.initials: PK
authors.lastname: Mukhopadhyay
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Pradeep K
authors.initials: PK
authors.lastname: Gupta
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Amarjeet
authors.initials: A
authors.lastname: Singh
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Sunil K
authors.initials: SK
authors.lastname: Sharma
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Kushvinder S
authors.initials: KS
authors.lastname: Bindra
authors.affiliation: Solid State Laser Division, Raja Ramanna Centre for Advanced Technology, Indore, M.P. 452013, India.
authors.forename: Shrikant M
authors.initials: SM
authors.lastname: Oak