Broadband spectral shaping in a Ti:sapphire regenerative amplifier

• Published in: Optics and laser technology Vol. 35; no. 6; pp. 425 - 429
• Main Authors: Leng, Yuxin, Lin, Lihuang, Wang, Wenyao, Jiang, Yunhua, Tang, Bin, Xu, Zhizhan
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2003; Elsevier Science
• Subjects: Birefringent plate; Doped-insulator lasers and other solid state lasers; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Laser optical systems: design and operation; Lasers; Optics; Physics; Resonators, cavities, amplifiers, arrays, and rings; Spectral shaping; Ti:sapphire regenerative amplifier; Ti:sapphire regenerative amplifier; Spectral shaping; Birefringent plate; Solid state lasers; Sapphire; Spectral filter; Theoretical study; Doped materials; Optical amplifier; Optical pulse compression; Experimental study; Intracavity; Titanium additions; Amplified spontaneous emission
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/S0030-3992(03)00038-0

A birefringent crystal quartz plate of known thickness has been used as a spectral filter for spectral shaping in a Ti:sapphire regenerative amplifier. The spectral profile of the amplified pulse ejected from the regenerative amplifier was observed while adjusting the birefringent crystal plate in the cavity. By altering the gain spectrum, the bandwidth of the regeneratively amplified pulse was increased from ∼18 to ∼35 nm by using a 0.34-mm thick birefringent plate. The output pulse spectrum from the regenerative amplifier neared the bandwidth of the seed pulse. As a comparison, we used a coated filter outside the regenerative amplifier cavity, and the bandwidth of the regeneratively amplified pulse was stretched to ∼28 nm . When the bandwidth was stretched to ∼35 nm , the pulse was compressed to ∼35 fs .